matplotlib-users Mailing List for matplotlib (Page 2)

On Mon, 2005年08月29日 at 17:39 +0200, Nicolas Girard wrote:
> Hi all,
> 
> I apologize for beeing slightly off-topic with this question, but I couldn't 
> think about a better place to ask :-/
> 
> Consider two vectors x1 and y1. Using matplotlib, plot(x1,y1) will display the 
> line joining all points whose coordinates are (x1(i),y1(i))
> Now, consider another couple of vectors x2 and y2.
> Using plot(x1,y1,x2,y2) we are shown the 2 lines corresponding to (x1,y1) and 
> (x2,y2), and we can compare these two lines with the naked eye
> 
> My question is, how to do this quantitatively ? Is there a way of calculating 
> the difference between the two sets of points, and then plot this difference, 
> using matplotlib ? I mean, if the data was generated using a fixed grid, it 
> would be enough to plot (y2-y1) but with an adaptative grid, x1 and x2 
> differ. Do you know about a quick & dirty way to achieve this ?
You have to interpolate the results to a common vector, and then perform
the difference. If you want to reproduce exactly the difference you can
see on-screen, then use a linear interpolation (cause the lines joining
successive points are straight, hence a linear interpolation - well,
assuming that your plot is in cartesian coordinates, else this becomes
more tricky), and map both set of results to the common vector
(list(x1)+list(x2)).sort() (remove duplicated values and reduce it to
the interval max(min(x1),min(x2)), min(max(x1),max(x2)) if you want to
be clean and safe...)

Hi,
you can look in the direction of polyfit, polyval function to do what do 
you want.
Regards,
 N
Nicolas Girard wrote:
>Hi all,
>
>I apologize for beeing slightly off-topic with this question, but I couldn't 
>think about a better place to ask :-/
>
>Consider two vectors x1 and y1. Using matplotlib, plot(x1,y1) will display the 
>line joining all points whose coordinates are (x1(i),y1(i))
>Now, consider another couple of vectors x2 and y2.
>Using plot(x1,y1,x2,y2) we are shown the 2 lines corresponding to (x1,y1) and 
>(x2,y2), and we can compare these two lines with the naked eye
>
>My question is, how to do this quantitatively ? Is there a way of calculating 
>the difference between the two sets of points, and then plot this difference, 
>using matplotlib ? I mean, if the data was generated using a fixed grid, it 
>would be enough to plot (y2-y1) but with an adaptative grid, x1 and x2 
>differ. Do you know about a quick & dirty way to achieve this ?
>
>Thanks in advance,
>cheers,
>Nicolas
>

On Monday 29 August 2005 11:03 am, si...@sc... wrote:
> Hi all,
>
> I've a stubborn problem with labels near the origin of my pylab plots,
> where the lowest tick label on the y-axis ends up touching the leftmost
> tick label on the x-axis. Now, I can certainly tweak these manually with
> xticks and yticks, but is there any automatic way to make this happen? More
> generally, is there a way to specify "breathing room" distance between the
> first/last tick mark and the beginning/end of the axis? Or to increase the
> distance between label and tick mark?
>
> Apologies if these are FAQs: I've looked everywhere I can think of at the
> moment, and am now officially stuck :-)
Try increasing the tick.major.pad in your rc settings (and also tick.minor.pad 
if needed).
Darren

Hi all,
I apologize for beeing slightly off-topic with this question, but I couldn't 
think about a better place to ask :-/
Consider two vectors x1 and y1. Using matplotlib, plot(x1,y1) will display the 
line joining all points whose coordinates are (x1(i),y1(i))
Now, consider another couple of vectors x2 and y2.
Using plot(x1,y1,x2,y2) we are shown the 2 lines corresponding to (x1,y1) and 
(x2,y2), and we can compare these two lines with the naked eye
My question is, how to do this quantitatively ? Is there a way of calculating 
the difference between the two sets of points, and then plot this difference, 
using matplotlib ? I mean, if the data was generated using a fixed grid, it 
would be enough to plot (y2-y1) but with an adaptative grid, x1 and x2 
differ. Do you know about a quick & dirty way to achieve this ?
Thanks in advance,
cheers,
Nicolas

Hi all,
I've a stubborn problem with labels near the origin of my pylab plots, where
the lowest tick label on the y-axis ends up touching the leftmost tick label
on the x-axis. Now, I can certainly tweak these manually with xticks and
yticks, but is there any automatic way to make this happen? More generally,
is there a way to specify "breathing room" distance between the first/last
tick mark and the beginning/end of the axis? Or to increase the distance
between label and tick mark?
Apologies if these are FAQs: I've looked everywhere I can think of at the
moment, and am now officially stuck :-)
Cheers,
Mike Sipior

Hi Benjamin,
Sorry but your code is still dependent on twisted:
Traceback (most recent call last):
 File "client.py", line 2, in ?
 from modules import mainwindow
 File "C:\Dev\BoaTest04\Benjamin\mat_test\modules\mainwindow.py", line=20
2, in ?
 from twisted.internet import wxreactor
ImportError: No module named twisted.internet
I don't have the time/nor interest (at least not at the moment) to get=20
twisted installed on my machine.
You should try to isolate your problem and part of that is probably to=20
get your matplotlib stuff NOT be dependent on a twisted feed, get the=20
data from a file or even just hard code it.
Tsch=FCss und vieli gr=FCss us em S=FCd Frankreich
Werner
Benjamin Schindler wrote:
>Oh- I forgot
>
>You don't need to execute the server - just launch client.py (I haven't
>stripped everything off)=20
>
>-----Urspr=FCngliche Nachricht-----
>Von: mat...@li...
>[mailto:mat...@li...] Im Auftrag von Wer=
ner
>F. Bruhin
>Gesendet: Montag, 29. August 2005 14:25
>An: mat...@li...
>Betreff: [Matplotlib-users] Re: AW: AW: Line2D and wx Backend
>
>Hi,
>
>Could you provide a sample showing the problem which is not depended on=20
> twisted?
>
>See you
>Werner
>
>Benjamin Schindler wrote:
> =20
>
>>I have been able to trace down my problem a little - but it's not solve=
d
>>yet.
>>I've added a self.axes.plot([0,1],[0,1]) when I'm adding a line to
>>self.axes. The first time I'm adding a line, I just see the 0,1 line. T=
he
>>second time, I see the lines I want to see. However, the grid doesn't
>> =20
>>
>scale
> =20
>
>>(so the lines keep updating in an area that's not visible anymore.
>>Any ideas?
>>
>>-----Urspr=FCngliche Nachricht-----
>>Von: mat...@li...
>>[mailto:mat...@li...] Im Auftrag von
>>Benjamin Schindler
>>Gesendet: Freitag, 26. August 2005 09:04
>>An: 'Ken McIvor'
>>Cc: mat...@li...
>>Betreff: AW: AW: [Matplotlib-users] Line2D and wx Backend
>>
>>I was simply trying out the hint you gave me. I didn't expect it to sol=
ve
>> =20
>>
>my
> =20
>
>>problem, but I tried anyway.=20
>>I found it to be the easiest thing I can do just to send it my code. It=
's
>>not _that_ complex, though you need twisted installed (I don't know
>> =20
>>
>whether
> =20
>
>>it'll work with 1.3 - I'm working with 2.0) and you'll need wxpython 2.=
6
>>(I'm using features only present in 2.6)
>>My Attachement is a zip-file. I figured that the outgoing mailserver
>> =20
>>
>blocks
> =20
>
>>mail witz zip attachements :-/. First start server.py (in root-dir) - i=
t
>>will generate the data, then start the client. In the sidebar (once the
>>client connected to the server) you can select/deselect sources. My ide=
a
>> =20
>>
>is,
> =20
>
>>that data collection just goes on, and If I select a source, It display=
s
>> =20
>>
>me
> =20
>
>>all the data currently collected.
>>The code that has to do with the matplotlib stuff is located in
>>plugins/wx/monitor.py. Receive(self, data, source) is the retreival
>> =20
>>
>function
> =20
>
>>and EnableSource is supposed to enable drawing of a particular
>> =20
>>
>data-source.
> =20
>
>>Sorry for not doing a very simple testcase - but I think the code in
>>monitor.py is simple enough =20
>>
>>-----Urspr=FCngliche Nachricht-----
>>Von: Ken McIvor [mailto:km...@gm...]=20
>>Gesendet: Donnerstag, 25. August 2005 17:12
>>An: Schindler Benjamin
>>Cc: mat...@li...
>>Betreff: Re: AW: [Matplotlib-users] Line2D and wx Backend
>>
>>On Aug 25, 2005, at 10:02 AM, Schindler Benjamin wrote:
>>
>> =20
>>
>>>Since I have to leave from here I cannot yet produce a sample app that=
=20
>>>would show this behaviour.
>>> =20
>>>
>>It doesn't have to be anything complex, just the bare functionality of=20
>>whatever you're working on. I'll be happy to take a look at it=20
>>tomorrow.
>>
>>
>> =20
>>
>>>However, I tried to have a non-empty list at the beginning. I replaced=
=20
>>>Line2D([],[]) with Line2D([1,2],[1,2]) just for the sake of trying -=20
>>>with no luck apparently.
>>> =20
>>>
>>I'm sorry if I gave you the impression that that was the problem...=20
>>it's a potential problem, but I didn't mean to suggest that it's why=20
>>your plot isn't being draw.
>>
>>Ken
>>
>>
>>
>>
>>-------------------------------------------------------
>>SF.Net email is Sponsored by the Better Software Conference & EXPO
>>September 19-22, 2005 * San Francisco, CA * Development Lifecycle
>> =20
>>
>Practices
> =20
>
>>Agile & Plan-Driven Development * Managing Projects & Teams * Testing &=
 QA
>>Security * Process Improvement & Measurement * http://www.sqe.com/bsce5=
sf
>> =20
>>
>
>
>
>-------------------------------------------------------
>SF.Net email is Sponsored by the Better Software Conference & EXPO
>September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practi=
ces
>Agile & Plan-Driven Development * Managing Projects & Teams * Testing & =
QA
>Security * Process Improvement & Measurement * http://www.sqe.com/bsce5s=
f
>_______________________________________________
>Matplotlib-users mailing list
>Mat...@li...
>https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>
>
>
>
> =20
>

Oh- I forgot
You don't need to execute the server - just launch client.py (I haven't
stripped everything off)=20
-----Urspr=FCngliche Nachricht-----
Von: mat...@li...
[mailto:mat...@li...] Im Auftrag von =
Werner
F. Bruhin
Gesendet: Montag, 29. August 2005 14:25
An: mat...@li...
Betreff: [Matplotlib-users] Re: AW: AW: Line2D and wx Backend
Hi,
Could you provide a sample showing the problem which is not depended on=20
 twisted?
See you
Werner
Benjamin Schindler wrote:
> I have been able to trace down my problem a little - but it's not =
solved
> yet.
> I've added a self.axes.plot([0,1],[0,1]) when I'm adding a line to
> self.axes. The first time I'm adding a line, I just see the 0,1 line. =
The
> second time, I see the lines I want to see. However, the grid doesn't
scale
> (so the lines keep updating in an area that's not visible anymore.
> Any ideas?
>=20
> -----Urspr=FCngliche Nachricht-----
> Von: mat...@li...
> [mailto:mat...@li...] Im Auftrag von
> Benjamin Schindler
> Gesendet: Freitag, 26. August 2005 09:04
> An: 'Ken McIvor'
> Cc: mat...@li...
> Betreff: AW: AW: [Matplotlib-users] Line2D and wx Backend
>=20
> I was simply trying out the hint you gave me. I didn't expect it to =
solve
my
> problem, but I tried anyway.=20
> I found it to be the easiest thing I can do just to send it my code. =
It's
> not _that_ complex, though you need twisted installed (I don't know
whether
> it'll work with 1.3 - I'm working with 2.0) and you'll need wxpython =
2.6
> (I'm using features only present in 2.6)
> My Attachement is a zip-file. I figured that the outgoing mailserver
blocks
> mail witz zip attachements :-/. First start server.py (in root-dir) - =
it
> will generate the data, then start the client. In the sidebar (once =
the
> client connected to the server) you can select/deselect sources. My =
idea
is,
> that data collection just goes on, and If I select a source, It =
displays
me
> all the data currently collected.
> The code that has to do with the matplotlib stuff is located in
> plugins/wx/monitor.py. Receive(self, data, source) is the retreival
function
> and EnableSource is supposed to enable drawing of a particular
data-source.
>=20
> Sorry for not doing a very simple testcase - but I think the code in
> monitor.py is simple enough =20
>=20
> -----Urspr=FCngliche Nachricht-----
> Von: Ken McIvor [mailto:km...@gm...]=20
> Gesendet: Donnerstag, 25. August 2005 17:12
> An: Schindler Benjamin
> Cc: mat...@li...
> Betreff: Re: AW: [Matplotlib-users] Line2D and wx Backend
>=20
> On Aug 25, 2005, at 10:02 AM, Schindler Benjamin wrote:
>=20
>>Since I have to leave from here I cannot yet produce a sample app that =
>>would show this behaviour.
>=20
>=20
> It doesn't have to be anything complex, just the bare functionality of =
> whatever you're working on. I'll be happy to take a look at it=20
> tomorrow.
>=20
>=20
>>However, I tried to have a non-empty list at the beginning. I replaced =
>>Line2D([],[]) with Line2D([1,2],[1,2]) just for the sake of trying -=20
>>with no luck apparently.
>=20
>=20
> I'm sorry if I gave you the impression that that was the problem...=20
> it's a potential problem, but I didn't mean to suggest that it's why=20
> your plot isn't being draw.
>=20
> Ken
>=20
>=20
>=20
>=20
> -------------------------------------------------------
> SF.Net email is Sponsored by the Better Software Conference & EXPO
> September 19-22, 2005 * San Francisco, CA * Development Lifecycle
Practices
> Agile & Plan-Driven Development * Managing Projects & Teams * Testing =
& QA
> Security * Process Improvement & Measurement * =
http://www.sqe.com/bsce5sf
-------------------------------------------------------
SF.Net email is Sponsored by the Better Software Conference & EXPO
September 19-22, 2005 * San Francisco, CA * Development Lifecycle =
Practices
Agile & Plan-Driven Development * Managing Projects & Teams * Testing & =
QA
Security * Process Improvement & Measurement * =
http://www.sqe.com/bsce5sf
_______________________________________________
Matplotlib-users mailing list
Mat...@li...
https://lists.sourceforge.net/lists/listinfo/matplotlib-users

Hi
Sortof, but not really. I've just discovered something reeeally =
interesting.
I've produced a sample app that exhibits this behaviour. However, =
monitor.py
(in plugins/wx) still depends on twisted.spread.pb. If I comment out =
that
import, it all runs fine. (you can add data with the a button and the =
slider
in the left pane)
It's hard for me guess who is causing the troubles - whether it's =
matplotlib
not beeing able to handle the twisted threading or twisted breaking
matplotlib - I don't know
-----Urspr=FCngliche Nachricht-----
Von: mat...@li...
[mailto:mat...@li...] Im Auftrag von =
Werner
F. Bruhin
Gesendet: Montag, 29. August 2005 14:25
An: mat...@li...
Betreff: [Matplotlib-users] Re: AW: AW: Line2D and wx Backend
Hi,
Could you provide a sample showing the problem which is not depended on=20
 twisted?
See you
Werner
Benjamin Schindler wrote:
> I have been able to trace down my problem a little - but it's not =
solved
> yet.
> I've added a self.axes.plot([0,1],[0,1]) when I'm adding a line to
> self.axes. The first time I'm adding a line, I just see the 0,1 line. =
The
> second time, I see the lines I want to see. However, the grid doesn't
scale
> (so the lines keep updating in an area that's not visible anymore.
> Any ideas?
>=20
> -----Urspr=FCngliche Nachricht-----
> Von: mat...@li...
> [mailto:mat...@li...] Im Auftrag von
> Benjamin Schindler
> Gesendet: Freitag, 26. August 2005 09:04
> An: 'Ken McIvor'
> Cc: mat...@li...
> Betreff: AW: AW: [Matplotlib-users] Line2D and wx Backend
>=20
> I was simply trying out the hint you gave me. I didn't expect it to =
solve
my
> problem, but I tried anyway.=20
> I found it to be the easiest thing I can do just to send it my code. =
It's
> not _that_ complex, though you need twisted installed (I don't know
whether
> it'll work with 1.3 - I'm working with 2.0) and you'll need wxpython =
2.6
> (I'm using features only present in 2.6)
> My Attachement is a zip-file. I figured that the outgoing mailserver
blocks
> mail witz zip attachements :-/. First start server.py (in root-dir) - =
it
> will generate the data, then start the client. In the sidebar (once =
the
> client connected to the server) you can select/deselect sources. My =
idea
is,
> that data collection just goes on, and If I select a source, It =
displays
me
> all the data currently collected.
> The code that has to do with the matplotlib stuff is located in
> plugins/wx/monitor.py. Receive(self, data, source) is the retreival
function
> and EnableSource is supposed to enable drawing of a particular
data-source.
>=20
> Sorry for not doing a very simple testcase - but I think the code in
> monitor.py is simple enough =20
>=20
> -----Urspr=FCngliche Nachricht-----
> Von: Ken McIvor [mailto:km...@gm...]=20
> Gesendet: Donnerstag, 25. August 2005 17:12
> An: Schindler Benjamin
> Cc: mat...@li...
> Betreff: Re: AW: [Matplotlib-users] Line2D and wx Backend
>=20
> On Aug 25, 2005, at 10:02 AM, Schindler Benjamin wrote:
>=20
>>Since I have to leave from here I cannot yet produce a sample app that =
>>would show this behaviour.
>=20
>=20
> It doesn't have to be anything complex, just the bare functionality of =
> whatever you're working on. I'll be happy to take a look at it=20
> tomorrow.
>=20
>=20
>>However, I tried to have a non-empty list at the beginning. I replaced =
>>Line2D([],[]) with Line2D([1,2],[1,2]) just for the sake of trying -=20
>>with no luck apparently.
>=20
>=20
> I'm sorry if I gave you the impression that that was the problem...=20
> it's a potential problem, but I didn't mean to suggest that it's why=20
> your plot isn't being draw.
>=20
> Ken
>=20
>=20
>=20
>=20
> -------------------------------------------------------
> SF.Net email is Sponsored by the Better Software Conference & EXPO
> September 19-22, 2005 * San Francisco, CA * Development Lifecycle
Practices
> Agile & Plan-Driven Development * Managing Projects & Teams * Testing =
& QA
> Security * Process Improvement & Measurement * =
http://www.sqe.com/bsce5sf
-------------------------------------------------------
SF.Net email is Sponsored by the Better Software Conference & EXPO
September 19-22, 2005 * San Francisco, CA * Development Lifecycle =
Practices
Agile & Plan-Driven Development * Managing Projects & Teams * Testing & =
QA
Security * Process Improvement & Measurement * =
http://www.sqe.com/bsce5sf
_______________________________________________
Matplotlib-users mailing list
Mat...@li...
https://lists.sourceforge.net/lists/listinfo/matplotlib-users

Hi,
Could you provide a sample showing the problem which is not depended on 
 twisted?
See you
Werner
Benjamin Schindler wrote:
> I have been able to trace down my problem a little - but it's not solved
> yet.
> I've added a self.axes.plot([0,1],[0,1]) when I'm adding a line to
> self.axes. The first time I'm adding a line, I just see the 0,1 line. The
> second time, I see the lines I want to see. However, the grid doesn't scale
> (so the lines keep updating in an area that's not visible anymore.
> Any ideas?
> 
> -----Ursprüngliche Nachricht-----
> Von: mat...@li...
> [mailto:mat...@li...] Im Auftrag von
> Benjamin Schindler
> Gesendet: Freitag, 26. August 2005 09:04
> An: 'Ken McIvor'
> Cc: mat...@li...
> Betreff: AW: AW: [Matplotlib-users] Line2D and wx Backend
> 
> I was simply trying out the hint you gave me. I didn't expect it to solve my
> problem, but I tried anyway. 
> I found it to be the easiest thing I can do just to send it my code. It's
> not _that_ complex, though you need twisted installed (I don't know whether
> it'll work with 1.3 - I'm working with 2.0) and you'll need wxpython 2.6
> (I'm using features only present in 2.6)
> My Attachement is a zip-file. I figured that the outgoing mailserver blocks
> mail witz zip attachements :-/. First start server.py (in root-dir) - it
> will generate the data, then start the client. In the sidebar (once the
> client connected to the server) you can select/deselect sources. My idea is,
> that data collection just goes on, and If I select a source, It displays me
> all the data currently collected.
> The code that has to do with the matplotlib stuff is located in
> plugins/wx/monitor.py. Receive(self, data, source) is the retreival function
> and EnableSource is supposed to enable drawing of a particular data-source.
> 
> Sorry for not doing a very simple testcase - but I think the code in
> monitor.py is simple enough 
> 
> -----Ursprüngliche Nachricht-----
> Von: Ken McIvor [mailto:km...@gm...] 
> Gesendet: Donnerstag, 25. August 2005 17:12
> An: Schindler Benjamin
> Cc: mat...@li...
> Betreff: Re: AW: [Matplotlib-users] Line2D and wx Backend
> 
> On Aug 25, 2005, at 10:02 AM, Schindler Benjamin wrote:
> 
>>Since I have to leave from here I cannot yet produce a sample app that 
>>would show this behaviour.
> 
> 
> It doesn't have to be anything complex, just the bare functionality of 
> whatever you're working on. I'll be happy to take a look at it 
> tomorrow.
> 
> 
>>However, I tried to have a non-empty list at the beginning. I replaced 
>>Line2D([],[]) with Line2D([1,2],[1,2]) just for the sake of trying - 
>>with no luck apparently.
> 
> 
> I'm sorry if I gave you the impression that that was the problem... 
> it's a potential problem, but I didn't mean to suggest that it's why 
> your plot isn't being draw.
> 
> Ken
> 
> 
> 
> 
> -------------------------------------------------------
> SF.Net email is Sponsored by the Better Software Conference & EXPO
> September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices
> Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA
> Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf

I have been able to trace down my problem a little - but it's not solved
yet.
I've added a self.axes.plot([0,1],[0,1]) when I'm adding a line to
self.axes. The first time I'm adding a line, I just see the 0,1 line. =
The
second time, I see the lines I want to see. However, the grid doesn't =
scale
(so the lines keep updating in an area that's not visible anymore.
Any ideas?
-----Urspr=FCngliche Nachricht-----
Von: mat...@li...
[mailto:mat...@li...] Im Auftrag von
Benjamin Schindler
Gesendet: Freitag, 26. August 2005 09:04
An: 'Ken McIvor'
Cc: mat...@li...
Betreff: AW: AW: [Matplotlib-users] Line2D and wx Backend
I was simply trying out the hint you gave me. I didn't expect it to =
solve my
problem, but I tried anyway.=20
I found it to be the easiest thing I can do just to send it my code. =
It's
not _that_ complex, though you need twisted installed (I don't know =
whether
it'll work with 1.3 - I'm working with 2.0) and you'll need wxpython 2.6
(I'm using features only present in 2.6)
My Attachement is a zip-file. I figured that the outgoing mailserver =
blocks
mail witz zip attachements :-/. First start server.py (in root-dir) - it
will generate the data, then start the client. In the sidebar (once the
client connected to the server) you can select/deselect sources. My idea =
is,
that data collection just goes on, and If I select a source, It displays =
me
all the data currently collected.
The code that has to do with the matplotlib stuff is located in
plugins/wx/monitor.py. Receive(self, data, source) is the retreival =
function
and EnableSource is supposed to enable drawing of a particular =
data-source.
Sorry for not doing a very simple testcase - but I think the code in
monitor.py is simple enough =20
-----Urspr=FCngliche Nachricht-----
Von: Ken McIvor [mailto:km...@gm...]=20
Gesendet: Donnerstag, 25. August 2005 17:12
An: Schindler Benjamin
Cc: mat...@li...
Betreff: Re: AW: [Matplotlib-users] Line2D and wx Backend
On Aug 25, 2005, at 10:02 AM, Schindler Benjamin wrote:
> Since I have to leave from here I cannot yet produce a sample app that =
> would show this behaviour.
It doesn't have to be anything complex, just the bare functionality of=20
whatever you're working on. I'll be happy to take a look at it=20
tomorrow.
> However, I tried to have a non-empty list at the beginning. I replaced =
> Line2D([],[]) with Line2D([1,2],[1,2]) just for the sake of trying -=20
> with no luck apparently.
I'm sorry if I gave you the impression that that was the problem...=20
it's a potential problem, but I didn't mean to suggest that it's why=20
your plot isn't being draw.
Ken

hello
it seems that the two examples date_demo1 et date_demo2
do not work if LC_TIME is not C. At least, they don't
work with fr_FR.UTF-8 nor with fr_FR.
Is this a known problem? is it a python or a matplotlib
problem?
-- 
	Pierre

===== Original message from Jeff Whitaker | 2005年8月25日:
> I've created matplotlib colormaps from all the color tables at 
> http://colorbrewer.org, and 
> http://geography.uoregon.edu/datagraphics/color_scales.htm
thanks for providing this,
i hope this will be included in the matplotlib distribution,
along with your script for previewing and listing all colormaps?
(see modification of original code below.)
i would like to mention another archive of color gradients,
http://cpt-city.org.uk/. two examples of color gradients
found here that i think might be useful for plotting data:
Nonlinear grays, e.g. gamma={1/3, 0.5, 0.8, 1.25, ..}
(human vision are more sensitive in the lighter range)
http://cpt-city.org.uk/tl/
Subtle close-to-grayscale gradients, like for instance the
sephia and cyanotype tinted monochrome colormaps found here:
http://cpt-city.org.uk/erj/multiple/
"""
 Usage: colormap-preview.py [cmapname]
 Adapted from original code by Jeff Whitaker
 http://sourceforge.net/mailarchive/message.php?msg_id=12764609
"""
import matplotlib.cm as cm
import pylab as p
def plot_colorbar(cmapname,nsteps=None):
 colormap = cm.__dict__[cmapname]
 fig=p.figure(figsize=(8,1))
 ax = fig.add_axes([0.05,0.05,0.9,0.70])
 if nsteps == None:
 nsteps = colormap.N+1
 clevs = p.linspace(0,1,nsteps+1)
 C = p.array([clevs,clevs])
 X,Y = p.meshgrid(clevs,[0,1])
 levs,coll = ax.contourf(C, Y, X, nsteps-1, cmap=colormap)
 ax.set_xticks([])
 ax.set_yticks([])
 p.title(cmapname)
 p.show()
if __name__ == "__main__":
 names = cm.datad.keys()
 import sys
 if len(sys.argv) > 1:
 cmapname = sys.argv[1]
 else:
 print len(names), 'total color maps'
 print sorted(names)
 cmapname = raw_input('color map name: ')
 if cmapname not in names:
 raise KeyError, 'invalid colormap name,' +\
 ' valid names are '+repr(names)
 plot_colorbar(cmapname)
## end of Python code
-- 
Vidar Bronken Gundersen
 blogged: http://www.37mm.no/blog/ColorBrewer_schemes_for_Matplotlib.html

On 2005年8月26日, Rich Shepard wrote:
> On 2005年8月26日, Arnd Baecker wrote:
>
> > I thought it might be of interest to some that a debian-science mailing
> > list has been created. Quoting debian-weekly:
>
> It's unfortunate that the effort is distribution-specific. After all the
> work to remove such differences from various distributions it's counter
> productive to try to re-instate divisions.
Have you actually read the part you snipped away in your reply?
> Perhaps others of us should
> promote a Slackware-science group. Or, a Gentoo-science group.
Just go ahead for slackware.
For Gentoo see:
http://www.gentoo.org/proj/en/desktop/science/index.xml
> Silly.
>
> Rich
Must be Friday, best,
Arnd

On 2005年8月26日, Arnd Baecker wrote:
> I thought it might be of interest to some that a debian-science mailing
> list has been created. Quoting debian-weekly:
 It's unfortunate that the effort is distribution-specific. After all the
work to remove such differences from various distributions it's counter
productive to try to re-instate divisions. Perhaps others of us should
promote a Slackware-science group. Or, a Gentoo-science group.
 Silly.
Rich
-- 
Dr. Richard B. Shepard, President | Author of "Quantifying Environmental
Applied Ecosystem Services, Inc. (TM) | Impact Assessments Using Fuzzy Logic"
<http://www.appl-ecosys.com> Voice: 503-667-4517 Fax: 503-667-8863

Hi all,
I'm having trouble displaying an image using the imshow() command in an e=
mbedded
TkinterCanvasAgg. I used mostly the examples embedding_in_tk2.py and
embedding_in_tk.py
I use two code parts : in my __init__ for the gui def I have :
 self.mplfImageDisplay =3D mpl.figure.Figure(figsize=3D(5,4), dpi=3D100=
)
 #add tk.DrawingArea
 self.cvImageDisplay =3D
FigureCanvasTkAgg(self.mplfImageDisplay,master=3DrightPaneImageDisplay)
 #self.canvas.show()
 self.cvImageDisplay.get_tk_widget().pack()
 #add toolbar
 toolbar =3D NavigationToolbar2TkAgg(self.cvImageDisplay,rightPaneImage=
Display)
 toolbar.update()
 self.cvImageDisplay._tkcanvas.pack()
then in one of my functions, if I use :
 a =3D self.mplfImageDisplay.add_subplot(111)
 a.contourf(x,y,self.scanformatdata,100) #cmap=3Dmpl.cm.gray)
 self.cvImageDisplay.show()
This works fine, but now, I would like to display an image :
 a =3D mpl.image.FigureImage(na.asarray(self.scanformatdata))
 self.cvImageDisplay.show()
This works but I can rescale the image not zoom in using the toolbar, so =
I tried
instead :
 a =3D mpl.axes.Axes(self.mplfImageDisplay,[0.1,1,0.1,1])
 a.imshow(na.asarray(self.scanformatdata),interpolation=3D'nearest')
 self.cvImageDisplay.show()
This does something but I don't know what since nothing is displayed...
Anyone has a clue ? Also, more generally speaking, I found quite extensiv=
e
documentation using the Pylab interface, but as soon as one moves away fr=
om
this (as when you need to if trying to embed in whatever backend, if i
understand well), then there doesn't exist much (?)... is there any sourc=
e I
would have missed ?
All the best,
Aure

Hi,
I thought it might be of interest to some that a
debian-science mailing list has been created.
Quoting debian-weekly:
 Debian Science Group. Helen Faulkner [14]announced the creation of the
 [15]debian-science mailing list. It is aimed to encourage discussions
 about how best to [16]use Debian as an operating system for scientific
 research and how to improve Debian by making it more useful to
 scientists and people working in related fields. It should also
 provide an address for scientists where they can ask questions about
 Debian or software in Debian and get useful answers.
 14. http://lists.debian.org/debian-devel/2005/07/msg01555.html
 15. http://lists.debian.org/debian-science/
 16. http://wiki.debian.net/?DebianScience
Best,
Arnd

On 8/26/05, Jeff Whitaker <js...@fa...> wrote:
> "def get_cmap" line (although this will not make them available via
> pylab calls like 'jet()' and 'hot()'). To get a quick view of what the
this is great, and I think the matlab way with a function for each
color map pollutes the namespace too much. I humbly suggest a syntax
like
 colormap('hot')
or to give bluetones for values < 0, greenish and brown above:
 colormap('earth', zerolevel=3D0.0)
etc. for pylab
Helge

I was simply trying out the hint you gave me. I didn't expect it to =
solve my
problem, but I tried anyway.=20
I found it to be the easiest thing I can do just to send it my code. =
It's
not _that_ complex, though you need twisted installed (I don't know =
whether
it'll work with 1.3 - I'm working with 2.0) and you'll need wxpython 2.6
(I'm using features only present in 2.6)
My Attachement is a zip-file. I figured that the outgoing mailserver =
blocks
mail witz zip attachements :-/. First start server.py (in root-dir) - it
will generate the data, then start the client. In the sidebar (once the
client connected to the server) you can select/deselect sources. My idea =
is,
that data collection just goes on, and If I select a source, It displays =
me
all the data currently collected.
The code that has to do with the matplotlib stuff is located in
plugins/wx/monitor.py. Receive(self, data, source) is the retreival =
function
and EnableSource is supposed to enable drawing of a particular =
data-source.
Sorry for not doing a very simple testcase - but I think the code in
monitor.py is simple enough =20
-----Urspr=FCngliche Nachricht-----
Von: Ken McIvor [mailto:km...@gm...]=20
Gesendet: Donnerstag, 25. August 2005 17:12
An: Schindler Benjamin
Cc: mat...@li...
Betreff: Re: AW: [Matplotlib-users] Line2D and wx Backend
On Aug 25, 2005, at 10:02 AM, Schindler Benjamin wrote:
> Since I have to leave from here I cannot yet produce a sample app that =
> would show this behaviour.
It doesn't have to be anything complex, just the bare functionality of=20
whatever you're working on. I'll be happy to take a look at it=20
tomorrow.
> However, I tried to have a non-empty list at the beginning. I replaced =
> Line2D([],[]) with Line2D([1,2],[1,2]) just for the sake of trying -=20
> with no luck apparently.
I'm sorry if I gave you the impression that that was the problem...=20
it's a potential problem, but I didn't mean to suggest that it's why=20
your plot isn't being draw.
Ken

Yes - this code works at home and at work (Linux/windows). I fail to see =
why
mine won't. I checked the id's - they're correct
-----Urspr=FCngliche Nachricht-----
Von: John Hunter [mailto:jdh...@ac...]=20
Gesendet: Donnerstag, 25. August 2005 18:01
An: Schindler Benjamin
Cc: mat...@li...
Betreff: Re: [Matplotlib-users] Line2D and wx Backend
>>>>> "Schindler" =3D=3D Schindler Benjamin <bsc...@st...> =
writes:
 Schindler> Hi - I'm having problems - I don't get any line
 Schindler> displayed on my screen. My code looks as follows
 Schindler> (Init):
Make sure you are working with the line you think you are
Rather than doing this
 self.axes.add_line(Line2D([],[])
do this
 self.line =3D Line2D([],[]
 self.axes.add_line(self.line)
After you do this
 line =3D self.data[source][0] # Retreive the line
check to make sure that id(line) and id(self.line) are the same.
Here is a simple example that binds events to adding line data.
Perhaps you can follow this (in wx you need to click on the figure
once before the keypress events will be processed)
from matplotlib.lines import Line2D
import matplotlib.numerix as nx
from pylab import figure, show
xdata =3D []
ydata =3D []
line =3D Line2D(xdata, ydata)
def add_data(event):
 if event.key!=3D'a': return
 xdata.extend(nx.mlab.rand(10))
 ydata.extend(nx.mlab.rand(10))
 line.set_data(xdata, ydata)
 fig.canvas.draw()
 =20
fig =3D figure()
ax =3D fig.add_subplot(111)
ax.add_line(line)
ax.set_title("Press 'a' to add more data")
fig.canvas.mpl_connect('key_press_event', add_data)
show()

On 2005年8月25日, Menno Straatsma apparently wrote: 
> How can I make make multiple plots within one script using 
> the newest python version? 
The short answer is:
give the fig() command before starting to create each plot,
and give only one show() command at the end.
However all plots will be displayed when you give the show 
command. Like you, I used to use multiple show() commands
in order to get sequential (one at a time) display. I found 
this useful in the classroom. I do not know how to do that 
in pylab now.
Cheers,
Alan Isaac

I've created matplotlib colormaps from all the color tables at 
http://colorbrewer.org, and 
http://geography.uoregon.edu/datagraphics/color_scales.htm. You can 
grab them at 
http://www.cdc.noaa.gov/people/jeffrey.s.whitaker/python/extracmaps.py.gz. 
Also included are the Generic Mapping Tools colormaps (at least the ones 
that are different from the built in mpl colormaps), for a total of 60. 
You can just paste the contents of that file into cm.py just above the 
"def get_cmap" line (although this will not make them available via 
pylab calls like 'jet()' and 'hot()'). To get a quick view of what the 
colormaps look like, I use this little script:
import matplotlib.cm as cm
import pylab as p
names = cm.datad.keys()
print len(names),'total color maps'
def plot_colorbar(cmapname,nsteps=None):
 colormap = cm.__dict__[cmapname]
 fig=p.figure(figsize=(8,1))
 ax = fig.add_axes([0.05,0.05,0.9,0.70])
 if nsteps == None:
 nsteps = colormap.N+1
 clevs = p.linspace(0,1,nsteps+1)
 C = p.array([clevs,clevs])
 X,Y = p.meshgrid(clevs,[0,1])
 levs,coll = ax.contourf(C, Y, X, nsteps-1, cmap=colormap)
 ax.set_xticks([])
 ax.set_yticks([])
 p.title(cmapname)
 p.show()
if __name__ == "__main__":
 cmapname = raw_input('color map name:')
 if cmapname not in names:
 raise KeyError, 'invalid colormap name, valid names are 
'+repr(names)
 plot_colorbar(cmapname)
Enjoy!
-Jeff
-- 
Jeffrey S. Whitaker Phone : (303)497-6313
Meteorologist FAX : (303)497-6449
NOAA/OAR/CDC R/CDC1 Email : Jef...@no...
325 Broadway Office : Skaggs Research Cntr 1D-124
Boulder, CO, USA 80303-3328 Web : http://tinyurl.com/5telg

> And the answer, for the archives.... ?
Sorry, I should have included this in my last email. 
It's quite easy:
from MA import set_print_limit
set_print_limit(NEW_LIMIT_HERE)
Regards,
Sascha

Don't I feel silly. --verbose-helpful is quite helpful. I was loading 
an rc file I didn't know I had saved in the directory where another test 
 script was saved. I deleted that other rc file with the bad backend 
string and everything is fine.
Ryan
John Hunter wrote:
>>>>>>"Ryan" == Ryan Krauss <rya...@co...> writes:
> 
> 
> Ryan> I have an interesting problem importing pylab. Most of my
> Ryan> work is stored on a FAT32 partition so I can access it from
> Ryan> windows or linux. If I run python from a dos command open
> Ryan> on that partition I get:
> 
> Ryan> E:\pythonscripts>python Enthought Edition build 1069 Python
> Ryan> 2.3.5 (#62, Mar 22 2005, 21:53:13) [MSC v.1200 32 bit
> Ryan> (Intel)] on win32 Type "help", "copyright", "credits" or
> Ryan> "license" for more information.
> >>>> import pylab
> Ryan> Traceback (most recent call last): File "<stdin>", line 1,
> Ryan> in ? File "C:\Python23\Lib\site-packages\pylab.py", line 1,
> Ryan> in ? from matplotlib.pylab import * File
> Ryan> "C:\Python23\Lib\site-packages\matplotlib\pylab.py", line
> Ryan> 199, in ? import backends File
> Ryan> "C:\Python23\Lib\site-packages\matplotlib\backends\__init__.py",
> Ryan> line 15, in ? raise ValueError, 'Unrecognized backend %s' %
> Ryan> backend ValueError: Unrecognized backend WxAgg
> 
> My guess is that this has nothing to do with partitions and that you
> may be reading two different rc files. One has 
> 
> backend : WxAgg
> 
> which is erroneous (should be WXAgg)
> 
> and the other has the win32 default
> 
> backend : TkAgg
> 
> which is working for you.
> 
> To test, create a script test.py
> 
> import pylab
> 
> and run it on both partitions with
> 
> python test.py --verbose-helpful
> 
> This will tell you which rc file is being loaded, what backend is
> chosen, etc.
> 
> 
> 
> -------------------------------------------------------
> SF.Net email is Sponsored by the Better Software Conference & EXPO
> September 19-22, 2005 * San Francisco, CA * Development Lifecycle Practices
> Agile & Plan-Driven Development * Managing Projects & Teams * Testing & QA
> Security * Process Improvement & Measurement * http://www.sqe.com/bsce5sf
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
> 

>>>>> "Schindler" == Schindler Benjamin <bsc...@st...> writes:
 Schindler> Hi - I'm having problems - I don't get any line
 Schindler> displayed on my screen. My code looks as follows
 Schindler> (Init):
Make sure you are working with the line you think you are
Rather than doing this
 self.axes.add_line(Line2D([],[])
do this
 self.line = Line2D([],[]
 self.axes.add_line(self.line)
After you do this
 line = self.data[source][0] # Retreive the line
check to make sure that id(line) and id(self.line) are the same.
Here is a simple example that binds events to adding line data.
Perhaps you can follow this (in wx you need to click on the figure
once before the keypress events will be processed)
from matplotlib.lines import Line2D
import matplotlib.numerix as nx
from pylab import figure, show
xdata = []
ydata = []
line = Line2D(xdata, ydata)
def add_data(event):
 if event.key!='a': return
 xdata.extend(nx.mlab.rand(10))
 ydata.extend(nx.mlab.rand(10))
 line.set_data(xdata, ydata)
 fig.canvas.draw()
 
fig = figure()
ax = fig.add_subplot(111)
ax.add_line(line)
ax.set_title("Press 'a' to add more data")
fig.canvas.mpl_connect('key_press_event', add_data)
show()

>>>>> "Ryan" == Ryan Krauss <rya...@co...> writes:
 Ryan> I have an interesting problem importing pylab. Most of my
 Ryan> work is stored on a FAT32 partition so I can access it from
 Ryan> windows or linux. If I run python from a dos command open
 Ryan> on that partition I get:
 Ryan> E:\pythonscripts>python Enthought Edition build 1069 Python
 Ryan> 2.3.5 (#62, Mar 22 2005, 21:53:13) [MSC v.1200 32 bit
 Ryan> (Intel)] on win32 Type "help", "copyright", "credits" or
 Ryan> "license" for more information.
 >>>> import pylab
 Ryan> Traceback (most recent call last): File "<stdin>", line 1,
 Ryan> in ? File "C:\Python23\Lib\site-packages\pylab.py", line 1,
 Ryan> in ? from matplotlib.pylab import * File
 Ryan> "C:\Python23\Lib\site-packages\matplotlib\pylab.py", line
 Ryan> 199, in ? import backends File
 Ryan> "C:\Python23\Lib\site-packages\matplotlib\backends\__init__.py",
 Ryan> line 15, in ? raise ValueError, 'Unrecognized backend %s' %
 Ryan> backend ValueError: Unrecognized backend WxAgg
My guess is that this has nothing to do with partitions and that you
may be reading two different rc files. One has 
 backend : WxAgg
which is erroneous (should be WXAgg)
and the other has the win32 default
 backend : TkAgg
which is working for you.
To test, create a script test.py
 import pylab
and run it on both partitions with
 python test.py --verbose-helpful
This will tell you which rc file is being loaded, what backend is
chosen, etc.