matplotlib-users Mailing List for matplotlib

All,
Does Matplotlib have a form of the clabel command that uses the 
switch manual, as in Matlab:
[c,h]=contour(x,y,z);
clabel(c,h,'manual')
Which allows the user to pick the contours to label with the mouse?
David Arnold
College of the Redwoods
http://msemac.redwoods.edu/~darnold/index.php

Hello,
I'm having troubles understand something about regression coefficients.
If I have two vectors:
x = [1.38, 1.98, 3.18, 3.56, 4.9, 6.21, 6.44, 7.47, 8.36, 8.81]
y = [8.19, 17.77, 20.12, 14.55, 20.17 ,31.22 ,28.94, 34.79, 40.26, 38.99]
and I would like to find out the regression coefficient I can use polyfit:
b1, b = polyfit(x,y,1)
my first question is can I get from polyfit the corrlation coeficient (I
know about corrcoef, just looking for more opotions).
The second question is about a fuction I wrote: according to
http://en.wikipedia.org/wiki/Regression_analysis#Linear_regression
it's pretty easy to write a little python funcion to calculate the
regression coefficients. Here is mine:
def b1(x,y):
 sum1 = 0
 sum2 = 0
 mx = mean(x)
 my = mean(y)
 for i,j in zip(x,y):
 sum1 =+ (i-mx)*(j-my)
 print sum1
 sum2 =+ (i-mx)**2
 b1 = sum1/sum2
 return b1
both methods yeild two different b1 values. Can anyone please tell me what
wrong with my function ?
Thanks, Oz.
-- 
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`. `' surrender your code.
 `- We will add your hardware and software
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----
 Imagine there's no countries
 It isn't hard to do
 Nothing to kill or die for
 And no religion too
 Imagine all the people
 Living life in peace
----
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 http://en.wikipedia.org/wiki/The_God_Delusion
---
when one person suffers from a delusion it is called insanity. When many
people suffer from a delusion it is called religion."
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2008年10月25日 Alan G Isaac <ai...@am...>
> On 10/25/2008 4:14 PM I. Soumpasis apparently wrote:
> > http://blog.deductivethinking.com/?p=29
>
> This is cool.
> But I do not see a license.
> May I hope this is released under the new BSD license,
> like the packages it depends on?
>
> The programs are GPL licensed. More info on the section of copyrights
http://wiki.deductivethinking.com/wiki/Deductive_Thinking:Copyrights.
I hope it is ok,
Ilias

On 10/25/2008 4:14 PM I. Soumpasis apparently wrote:
> http://blog.deductivethinking.com/?p=29
This is cool.
But I do not see a license.
May I hope this is released under the new BSD license,
like the packages it depends on?
Thanks,
Alan Isaac

Dear lists,
DeductiveThinking.com now provides the Python programs for the book of M.
Keeling & P. Rohani "Modeling Infectious Diseases in Humans and Animals",
Princeton University Press, 2008. The book has on-line material which
includes programs for different models in various programming languages and
mathematical tools such as, "C++, FORTRAN and Matlab, while some are also
coded in the web-based Java programming language to allow readers to quickly
experiment with these types of models", as it is stated at the website. The
Python version of the programs were written long ago and submitted to the
book's on line material website (available soon). The Python programs with
the basic equations modelled and the results in figures were now uploaded on
a special wiki page of DeductiveThinking.com.
Since, the programs are heavily using numpy, scipy and matplotlib libraries,
I send this announcement to all the three lists and the main python-list;
sorry for double-posting. The announcement with the related links is
uploaded here http://blog.deductivethinking.com/?p=29. The programs are at
http://wiki.deductivethinking.com/wiki/Python_Programs_for_Modelling_Infectious_Diseases_book.
For those who are interested on modelling and epidemiology, they can take a
look at the main site (http://deductivethinking.com) or the main page of the
wiki (http://wiki.deductivethinking.com) and follow the epidemiology links.
The website is in its beginning, so limited information is uploaded up to
now.
Thanks for your time and I hope it will be useful for some people,
Best Regards,
Ilias Soumpasis

Florian Koelling wrote:
> Hi Folks!
> 
> I want to create a bar chart having 85 different Objects, each Object 
> owning a certain name of four letters -- I followed the examples on 
> the matplotlib examples page - so far so good.
> 
> I have some problems with the y_labeling because every objects name is 
> overlaid by it' s neighbour and so a proper assignment is not 
> possible. I tried to change the bar size, but that did not have any 
> effect on the y_label.
I think you are talking about labels for the bars, not tick labels or 
the y-axis label, correct?
> 
> Is it possible to display the object names vertical 1
> y
> k
> 7
> 
> instead of horizontal (1yk7) to obtain a better readable figure?
> or maybe some of you have a better idea?
Yes, text objects can be rotated. In the barchart_demo.py example, you 
can add to the text command the keyword argument rotation='vertical' 
(or give a number for angle in degrees).
Eric

Hi Folks!
I want to create a bar chart having 85 different Objects, each Object 
owning a certain name of four letters -- I followed the examples on 
the matplotlib examples page - so far so good.
I have some problems with the y_labeling because every objects name is 
overlaid by it' s neighbour and so a proper assignment is not 
possible. I tried to change the bar size, but that did not have any 
effect on the y_label.
Is it possible to display the object names vertical 1
 y
 k
 7
instead of horizontal (1yk7) to obtain a better readable figure?
or maybe some of you have a better idea?