matplotlib-users Mailing List for matplotlib

On 8/24/12 3:37 PM, klo uo wrote:
> I wanted to overlay some plot over map, and thought to use one of
> provided background maps that come with Basemap
> Result isn't that great as expected: loading bluemarble map took 1GB
> memory, and zooming i.e. Europe region on 1920x1080 screen is too
> blurred w/o details. As a consequence, using custom basemap with even
> greater resolution is out of consideration
>
> OTOH whatever I do in Google Earth, memory never exceeds 200MB and
> it's even lower with ArcGIS Explorer with any basemap on it. Maybe
> it's because these packages use advanced tilling features maybe it's
> else, but isn't there something that can be done with Basemap package
> so that topological maps can be useful with it? Like using some GIS
> webservice or similar?
Oh sure, it's simple!
http://www.google.com/patents?id=J4YOAAAAEBAJ&dq=6618053
-Jeff
>
> ------------------------------------------------------------------------------
> Live Security Virtual Conference
> Exclusive live event will cover all the ways today's security and
> threat landscape has changed and how IT managers can respond. Discussions
> will include endpoint security, mobile security and the latest in malware
> threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
> _______________________________________________
> Matplotlib-users mailing list
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> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
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Jeffrey S. Whitaker Phone : (303)497-6313
Meteorologist FAX : (303)497-6449
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________________________________
 From: Damon McDougall <dam...@gm...>
To: Michael Rawlins <raw...@ya...> 
Cc: "mat...@li..." <mat...@li...> 
Sent: Friday, August 24, 2012 4:22 PM
Subject: Re: [Matplotlib-users] plotting a colored symbol with plot command
 
On Fri, Aug 24, 2012 at 09:20:47PM +0100, Damon McDougall wrote:
> Hey Michael!
> 
> Welcome :)
> 
> On Fri, Aug 24, 2012 at 01:00:13PM -0700, Michael Rawlins wrote:
> > 
> > Relatively new user here. I need to place a series of white colored dots on a map. I've been able to place black dots using:
> > 
> > plt.plot(x,y,color='k',marker='.',markersize=3.0)
> >
> 
> You can change the colour with:
> 
> plt.pyplot(x, y, color='g', marker='.', markersize=3.0)
> 
> That will plot a green dot.
Damon,
plt.pyplot gives an error:
AttributeError: 'module' object has no attribute 'pyplot'
If I use plt.plot(x, y, color='g', marker='.', markersize=3.0)
the dots are black. But I've found success with:
plt.plot(x,y,'wo',markeredgecolor='white',markersize=3.0)
so all is well. Thanks for your help.
> 
> > 
> > The color option in this command does not plot the chosen color, only black. The command:
> > 
> > plt.plot(x,y,'wo')
> >
> 
> You can change the colour of the edge with the 'markeredgecolour'
>
-- 
Damon McDougall
http://www.damon-is-a-geek.com
B2.39
Mathematics Institute
University of Warwick
Coventry
West Midlands
CV4 7AL
United Kingdom

I wanted to overlay some plot over map, and thought to use one of
provided background maps that come with Basemap
Result isn't that great as expected: loading bluemarble map took 1GB
memory, and zooming i.e. Europe region on 1920x1080 screen is too
blurred w/o details. As a consequence, using custom basemap with even
greater resolution is out of consideration
OTOH whatever I do in Google Earth, memory never exceeds 200MB and
it's even lower with ArcGIS Explorer with any basemap on it. Maybe
it's because these packages use advanced tilling features maybe it's
else, but isn't there something that can be done with Basemap package
so that topological maps can be useful with it? Like using some GIS
webservice or similar?

On Fri, Aug 24, 2012 at 09:20:47PM +0100, Damon McDougall wrote:
> Hey Michael!
> 
> Welcome :)
> 
> On Fri, Aug 24, 2012 at 01:00:13PM -0700, Michael Rawlins wrote:
> > 
> > Relatively new user here. I need to place a series of white colored dots on a map. I've been able to place black dots using:
> > 
> > plt.plot(x,y,color='k',marker='.',markersize=3.0)
> >
> 
> You can change the colour with:
> 
> plt.pyplot(x, y, color='g', marker='.', markersize=3.0)
> 
> That will plot a green dot.
> 
> > 
> > The color option in this command does not plot the chosen color, only black. The command:
> > 
> > plt.plot(x,y,'wo')
> >
> 
> You can change the colour of the edge with the 'markeredgecolour'
>
Sorry! That should me 'markeredgecolor'. All commands are American
spelling.
If I had a penny for every time I got a syntax error for using British
spelling, I'd have about 3 pence.
> option, or 'mec' for short:
> 
> plt.plot(x, y, 'wo', mec='w')
> 
> Kablam! Big white Os with no black edge.
> You can also control the size of the marker there, too:
> 
> plt.plot(x, y, 'wo', mec='w', markersize=10.0)
> 
> > 
> > places white dots with black around the edges. I see that the 'w' is for white and 'o' is for the symbol. I'd like to use the former command since that gives me control over marker size and a dot without a black edge.
> > 
> > Lastly, it's not clear to me if I should be using plt.plot or just plot. Both work, and I don't know the difference. 
> 
> If you're using pylab, it doesn't matter:
> 
> In [5]: print plot
> <function plot at 0x10cddbd70>
> 
> In [6]: print plt.plot
> <function plot at 0x10cddbd70>
> 
> They are *literally* the same function in memory.
> 
> Hope this helps, Michael.
> Good luck!
> 
> -- 
> Damon McDougall
> http://www.damon-is-a-geek.com
> B2.39
> Mathematics Institute
> University of Warwick
> Coventry
> West Midlands
> CV4 7AL
> United Kingdom
-- 
Damon McDougall
http://www.damon-is-a-geek.com
B2.39
Mathematics Institute
University of Warwick
Coventry
West Midlands
CV4 7AL
United Kingdom

Hey Michael!
Welcome :)
On Fri, Aug 24, 2012 at 01:00:13PM -0700, Michael Rawlins wrote:
> 
> Relatively new user here. I need to place a series of white colored dots on a map. I've been able to place black dots using:
> 
> plt.plot(x,y,color='k',marker='.',markersize=3.0)
>
You can change the colour with:
plt.pyplot(x, y, color='g', marker='.', markersize=3.0)
That will plot a green dot.
> 
> The color option in this command does not plot the chosen color, only black. The command:
> 
> plt.plot(x,y,'wo')
>
You can change the colour of the edge with the 'markeredgecolour'
option, or 'mec' for short:
plt.plot(x, y, 'wo', mec='w')
Kablam! Big white Os with no black edge.
You can also control the size of the marker there, too:
plt.plot(x, y, 'wo', mec='w', markersize=10.0)
> 
> places white dots with black around the edges. I see that the 'w' is for white and 'o' is for the symbol. I'd like to use the former command since that gives me control over marker size and a dot without a black edge.
> 
> Lastly, it's not clear to me if I should be using plt.plot or just plot. Both work, and I don't know the difference. 
If you're using pylab, it doesn't matter:
In [5]: print plot
<function plot at 0x10cddbd70>
In [6]: print plt.plot
<function plot at 0x10cddbd70>
They are *literally* the same function in memory.
Hope this helps, Michael.
Good luck!
-- 
Damon McDougall
http://www.damon-is-a-geek.com
B2.39
Mathematics Institute
University of Warwick
Coventry
West Midlands
CV4 7AL
United Kingdom

Relatively new user here. I need to place a series of white colored dots on a map. I've been able to place black dots using:
plt.plot(x,y,color='k',marker='.',markersize=3.0)
The color option in this command does not plot the chosen color, only black. The command:
plt.plot(x,y,'wo')
places white dots with black around the edges. I see that the 'w' is for white and 'o' is for the symbol. I'd like to use the former command since that gives me control over marker size and a dot without a black edge.
Lastly, it's not clear to me if I should be using plt.plot or just plot. Both work, and I don't know the difference. 

I have lat and lon as coordinates and to each point a value. So far I use contourf to plot. 
Am 24.08.2012 um 18:14 schrieb Benjamin Root <ben...@ou...>:
> 
> 
> On Fri, Aug 24, 2012 at 11:57 AM, John Bluee <b7...@gm...> wrote:
> Hi all
> 
> I have to plot seismic data on a worldmap and use the Basemap framework to do it.
> My dataset contains important data in the range of -1e-8 to -1e-14 and 1e-14 to 1e-9. Can I limit the plot to only display data in this range?
> 
> thanks and greets
> 
> 
> How are you plotting your data (plot, pcolor, scatter, etc?). Also, is that range the range of values in your arrays, or are they some sort of coordinate ranges?
> 
> Cheers!
> Ben Root
> 

On Fri, Aug 24, 2012 at 11:57 AM, John Bluee <b7...@gm...> wrote:
> Hi all
>
> I have to plot seismic data on a worldmap and use the Basemap framework to
> do it.
> My dataset contains important data in the range of -1e-8 to -1e-14 and
> 1e-14 to 1e-9. Can I limit the plot to only display data in this range?
>
> thanks and greets
>
>
How are you plotting your data (plot, pcolor, scatter, etc?). Also, is
that range the range of values in your arrays, or are they some sort of
coordinate ranges?
Cheers!
Ben Root

Hi all
I have to plot seismic data on a worldmap and use the Basemap framework to do it.
My dataset contains important data in the range of -1e-8 to -1e-14 and 1e-14 to 1e-9. Can I limit the plot to only display data in this range?
thanks and greets

On 8/24/12 8:46 AM, Carlos Grohmann wrote:
> Hello all,
>
> I just did a fresh macports install, and installed 
> py27-matplotlib-basemap, so all dependencies were installed as well.
>
> After installing python, I did run port-select (or something like it) 
> to make sure I'm using macports python.
>
> My problem is that I can't run it:
You are not running macports python (you're running Apple python). Try 
running /opt/local/bin/python27, and then import basemap.
-Jeff
>
>
> GuanoMac:~ guano$ python
> Python 2.7.2 (v2.7.2:8527427914a2, Jun 11 2011, 15:22:34)
> [GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
> >>> from mpl_toolkits.basemap import Basemap
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> ImportError: No module named basemap
>
>
> Anyone experienced in this kind of installation could share hints?
>
> tks
>
> Carlos
>
> -- 
> Prof. Carlos Henrique Grohmann
> Institute of Geosciences - Univ. of São Paulo, Brazil
> - Digital Terrain Analysis | GIS | Remote Sensing -
>
> http://carlosgrohmann.com <http://carlosgrohmann.com/>
> ________________
> Can't stop the signal.
>
>
>
> ------------------------------------------------------------------------------
> Live Security Virtual Conference
> Exclusive live event will cover all the ways today's security and
> threat landscape has changed and how IT managers can respond. Discussions
> will include endpoint security, mobile security and the latest in malware
> threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
>
>
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
-- 
Jeffrey S. Whitaker Phone : (303)497-6313
Meteorologist FAX : (303)497-6449
NOAA/OAR/PSD R/PSD1 Email : Jef...@no...
325 Broadway Office : Skaggs Research Cntr 1D-113
Boulder, CO, USA 80303-3328 Web : http://tinyurl.com/5telg

Hi,
Macports python is currently 2.7.3.
I don't think you are running macports python.
Try /opt/local/python & see if you have the same problem.
George Nurser
On 24 August 2012 15:46, Carlos Grohmann <car...@gm...> wrote:
> Hello all,
>
> I just did a fresh macports install, and installed py27-matplotlib-basemap,
> so all dependencies were installed as well.
>
> After installing python, I did run port-select (or something like it) to
> make sure I'm using macports python.
>
> My problem is that I can't run it:
>
>
> GuanoMac:~ guano$ python
> Python 2.7.2 (v2.7.2:8527427914a2, Jun 11 2011, 15:22:34)
> [GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
>>>> from mpl_toolkits.basemap import Basemap
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> ImportError: No module named basemap
>
>
> Anyone experienced in this kind of installation could share hints?
>
> tks
>
> Carlos
>
> --
> Prof. Carlos Henrique Grohmann
> Institute of Geosciences - Univ. of São Paulo, Brazil
> - Digital Terrain Analysis | GIS | Remote Sensing -
>
> http://carlosgrohmann.com
> ________________
> Can’t stop the signal.
>
>
> ------------------------------------------------------------------------------
> Live Security Virtual Conference
> Exclusive live event will cover all the ways today's security and
> threat landscape has changed and how IT managers can respond. Discussions
> will include endpoint security, mobile security and the latest in malware
> threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>

2012年8月24日 Carlos Grohmann <car...@gm...>:
> Hello all,
>
> I just did a fresh macports install, and installed py27-matplotlib-basemap,
> so all dependencies were installed as well.
>
> After installing python, I did run port-select (or something like it) to
> make sure I'm using macports python.
>
> My problem is that I can't run it:
>
>
> GuanoMac:~ guano$ python
> Python 2.7.2 (v2.7.2:8527427914a2, Jun 11 2011, 15:22:34)
> [GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
> Type "help", "copyright", "credits" or "license" for more information.
>>>> from mpl_toolkits.basemap import Basemap
> Traceback (most recent call last):
> File "<stdin>", line 1, in <module>
> ImportError: No module named basemap
>
>
> Anyone experienced in this kind of installation could share hints?
if you do
import sys
print sys.path
you can check if the directory of basemap is in your path
if not, you can add it both in the scritp/session
appending/inserting/extending sys.path (which is a list):
e.g.: sys.path.append( "dir/to/basemap" )
or in the .profile, .bash_profile or .bash_rc files (in this way is
loaded in every session)
export PYTHONPATH=$PYTHONPATH:dir/to/basemap
cheers,
Francesco
>
> tks
>
> Carlos
>
> --
> Prof. Carlos Henrique Grohmann
> Institute of Geosciences - Univ. of São Paulo, Brazil
> - Digital Terrain Analysis | GIS | Remote Sensing -
>
> http://carlosgrohmann.com
> ________________
> Can’t stop the signal.
>
>
> ------------------------------------------------------------------------------
> Live Security Virtual Conference
> Exclusive live event will cover all the ways today's security and
> threat landscape has changed and how IT managers can respond. Discussions
> will include endpoint security, mobile security and the latest in malware
> threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
>

Hello all,
I just did a fresh macports install, and installed py27-matplotlib-basemap,
so all dependencies were installed as well.
After installing python, I did run port-select (or something like it) to
make sure I'm using macports python.
My problem is that I can't run it:
GuanoMac:~ guano$ python
Python 2.7.2 (v2.7.2:8527427914a2, Jun 11 2011, 15:22:34)
[GCC 4.2.1 (Apple Inc. build 5666) (dot 3)] on darwin
Type "help", "copyright", "credits" or "license" for more information.
>>> from mpl_toolkits.basemap import Basemap
Traceback (most recent call last):
 File "<stdin>", line 1, in <module>
ImportError: No module named basemap
Anyone experienced in this kind of installation could share hints?
tks
Carlos
-- 
Prof. Carlos Henrique Grohmann
Institute of Geosciences - Univ. of São Paulo, Brazil
- Digital Terrain Analysis | GIS | Remote Sensing -
http://carlosgrohmann.com
________________
Can’t stop the signal.

Thanks Ben,
Works fine.
Regards,
Joseph David Borġ
http://www.jdborg.com
On 24 August 2012 13:41, Benjamin Root <ben...@ou...> wrote:
>
> On Fri, Aug 24, 2012 at 6:35 AM, Joe Borġ <ma...@jd...> wrote:
>
>> Hi,
>>
>> I've reinstalled numpy and the error from gcc has changed. Please see
>> log, all the system information should be in there.
>>
>>
> Matplotlib 1.1.1 does not work with py3k. We are just about ready to
> release v1.2.0 which will work with py3k. Please feel free to checkout the
> master branch on our github page and test it out before the release!
>
> Ben Root
>
>

On Fri, Aug 24, 2012 at 6:35 AM, Joe Borġ <ma...@jd...> wrote:
> Hi,
>
> I've reinstalled numpy and the error from gcc has changed. Please see
> log, all the system information should be in there.
>
>
Matplotlib 1.1.1 does not work with py3k. We are just about ready to
release v1.2.0 which will work with py3k. Please feel free to checkout the
master branch on our github page and test it out before the release!
Ben Root

Hi,
I've reinstalled numpy and the error from gcc has changed. Please see log,
all the system information should be in there.
Regards,
Joseph David Borġ
http://www.jdborg.com

On 2012年08月23日 6:52 PM, Andrew Nelson wrote:
> Dear list,
> apologies for what might be a simple question. I am creating an
> application that uses matplotlib for plotting, using the Qt4Agg backend.
> I can create the figures without a problem.
>
> However, I wish to save the state of the application, including the
> graphs. The complicating factor is that the user may have altered the
> appearance of the graphs via a NavigationToolbar.
>
> I have no problems saving the data that makes up the graphs, but how do
> I save the properties of the graphs (line colour, linewidth, etc)?
> I tried using matplotlib.artist.ArtistInspector(Line2D).properties().
> This gives a dictionary of all the properties. However, when I try to
> pickle this I get picking errors:
>
> cPickle.PicklingError: Can't pickle <class
> 'matplotlib.axes.AxesSubplot'>: attribute lookup
> matplotlib.axes.AxesSubplot failed
>
> I am sure that there is an easy way of achieving this, I just can't see
> it in the documentation. I appreciate any help the list is able to give me.
Maybe there is not an easy way...
See https://github.com/matplotlib/matplotlib/pull/1020.
Eric
>
> regards,
> Andrew
>

Dear list,
apologies for what might be a simple question. I am creating an application
that uses matplotlib for plotting, using the Qt4Agg backend. I can create
the figures without a problem.
However, I wish to save the state of the application, including the graphs.
 The complicating factor is that the user may have altered the appearance
of the graphs via a NavigationToolbar.
I have no problems saving the data that makes up the graphs, but how do I
save the properties of the graphs (line colour, linewidth, etc)?
I tried using matplotlib.artist.ArtistInspector(Line2D).properties(). This
gives a dictionary of all the properties. However, when I try to pickle
this I get picking errors:
cPickle.PicklingError: Can't pickle <class 'matplotlib.axes.AxesSubplot'>:
attribute lookup matplotlib.axes.AxesSubplot failed
I am sure that there is an easy way of achieving this, I just can't see it
in the documentation. I appreciate any help the list is able to give me.
regards,
Andrew
-- 
_____________________________________
Dr. Andrew Nelson
_____________________________________