Re: [Matplotlib-users] Latex primed regression?

2012-04-16 Thread Michael Droettboom

  
  
What is the math string you are using?  I can't seem to reproduce
this with:

   "$D_{40}\prime\prime$"

What are your math-related rcParams?

Mike

On 04/15/2012 08:53 PM, Alexander Wagner wrote:

  
   Dear Matplotlib
users,

Mathtext primed used to be rendered correctly in 1.0.0 like so



But now they look tiny and badly spaced in 1.1.0 like so



I haven't tried with all fonts, but it is the case with
Bitstream Vera Sans and Helvetica. Can anyone confirm?

If I use the LaTeX renderer, it looks correct.

Many thanks,
Alex


  
  
  
  
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Re: [Matplotlib-users] Latex primed regression?

2012-04-16 Thread Alexander Wagner

  
  
I'm using  $D_{40}^{\prime\prime}$

I think this is how prime should be used in latex, or? 

Using mathtext, when i don't include "^" I get 





Here, the spacing between the primed is too far apart. Also, in
regular latex, primed is usually in superscript, i think, otherwise,
without the '^' one gets: 



I hope i'm not totally wrong, but the mathtext interpreter seems to
be inconsistent with the regular latex notation, and the primes are
also too widely spaced. I guess it's not that important, it's just
aesthetically a bit unsatisfactory.

Best wishes,
Alex


On 16/04/12 10:50 PM, Michael Droettboom wrote:

  
  What is the math string you are using?  I can't seem to reproduce
  this with:
  
     "$D_{40}\prime\prime$"
  
  What are your math-related rcParams?
  
  Mike
  
  On 04/15/2012 08:53 PM, Alexander Wagner wrote:
  

 Dear Matplotlib
  users,
  
  Mathtext primed used to be rendered correctly in 1.0.0 like so
  
  
  
  But now they look tiny and badly spaced in 1.1.0 like so
  
  
  
  I haven't tried with all fonts, but it is the case with
  Bitstream Vera Sans and Helvetica. Can anyone confirm?
  
  If I use the LaTeX renderer, it looks correct.
  
  Many thanks,
  Alex
  
  




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Re: [Matplotlib-users] Latex primed regression?

2012-04-16 Thread Alexander Wagner

  
  
ps. my math-related rcParams are just the defaults, i think

mathtext.cal : cursive
  mathtext.rm  : serif
  mathtext.tt  : monospace
  mathtext.it  : serif:italic
  mathtext.bf  : serif:bold
  mathtext.sf  : sans
  mathtext.fontset : cm 
  mathtext.fallback_to_cm : True
  mathtext.default : it 


On 16/04/12 10:50 PM, Michael Droettboom wrote:

  
  What is the math string you are using?  I can't seem to reproduce
  this with:
  
     "$D_{40}\prime\prime$"
  
  What are your math-related rcParams?
  
  Mike
  
  On 04/15/2012 08:53 PM, Alexander Wagner wrote:
  

 Dear Matplotlib
  users,
  
  Mathtext primed used to be rendered correctly in 1.0.0 like so
  
  
  
  But now they look tiny and badly spaced in 1.1.0 like so
  
  
  
  I haven't tried with all fonts, but it is the case with
  Bitstream Vera Sans and Helvetica. Can anyone confirm?
  
  If I use the LaTeX renderer, it looks correct.
  
  Many thanks,
  Alex
  
  




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[Matplotlib-users] Axes.fill_between() for two arbitrary curves

2012-04-16 Thread Damon McDougall
Hi, 

I have two arrays of coordinates in the x-y plane, z_1 and z_2. The array z_1 
encloses a closed, convex and simply connected region (not a circle). The array 
z_2 encloses another object that is also closed, convex and simply connected. 
The region enclosed by z_2 is contained entirely within the region described by 
z_1. The picture in your head should be of one blob inside another.

I want to use Axes.fill_between() to fill the 'annulus' region. This is the 
region containing points that are enclosed by z_1, but not by z_2. Is this 
possible? I've tried fiddling with the 'where' kwarg to no avail. Since they 
are not circles, I figured this is a no-go with the current matplotlib Axes.* 
functions. Is my best bet to build a PolyCollection or a matplotlib.patch and 
add it to the axes myself?

Any help is greatly appreciated.
Thank you.

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Re: [Matplotlib-users] Bug in legend?

2012-04-16 Thread Paul Hobson
On Mon, Apr 16, 2012 at 4:58 AM, Yannick Copin
 wrote:
> Hi List,
>
> I think I found a bug in legend of a fill command (see attached code and
> figure) when the facecolor is 'none' but the alpha is not None (I'm using
> latest matplotlib 1.1.0). If confirmed, should I fill in a but report?

I see identical behavior in Christoph Gohlke's Windows build of
Matplotlib 1.2.X for Python 3.2.

The same thing occurs if you remove the "alpha=None" altogether.
-paul

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Re: [Matplotlib-users] How to draw maps like in m_map tool?

2012-04-16 Thread Arnaldo Russo
Hi matplotlib users.
Has anyone gave the first steps or finished a patch for this?
I don't have enough knowledge to propose one, but I could try to help in
any improvement or testing.
Thank you,
Arnaldo.

---
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Lab. de Estudos dos Oceanos e Clima
Instituto de Oceanografia - FURG

Jeff Whitaker  writes:

>
>
> On 1/2/11 9:17 PM, Linuxer Wang wrote:
>
>
>   Hi, Jeff
>   Sorry for the confusion. Yes, I mean to draw the black/white
>   border (called fancy box in m_map). Drawing the maps is really
>   easy to use, thanks for your great Api. Is there plan to support
>   the fancy border feature in near future?
>
>
> No, but patches are welcome.
> -Jeff
>   Thank you for replying.
>   On 01/02/2011 06:09 PM, Jeff Whitaker wrote:
>
> On 1/2/11 1:01 PM, Linuxer Wang wrote:
>
>   This may be a question for Jeffrey Whitaker but welcome
>   anyone's help.
>   I used to use the m_map tool for matlab (
http://www.eos.ubc.ca/~rich/map.html).
>
>
>
>
>   Does anybody know how to draw the same maps in matplotlib
>   (BaseMap)? Specifically, how to draw axes in such figures:
http://www.eos.ubc.ca/~rich/private/extblueocean.gif
>   or http://www.eos.ubc.ca/~rich/private/exmiller.gif
>   ?
>   Thanks a lot.
>
> Can you be more specific about what you need help with?  Is it
> drawing the map itself, or drawing the lines on the map?
> examples/nytolondon.py shows how to draw great circles, which is
> similar to the extblueocean.gif example.
> If you are asking how to draw that black and white border around
> the map, that is not supported.  However, it is easy to draw
> labelled meridians and parallels (with the drawparallels and
> drawmeridians class methods).  Docs are at
http://matplotlib.sourceforge.net/basemap/doc/html/api/index.html,
> and there are lots of examples in the 'examples' directory of
> the source distribution.
> HTH,
> -Jeff
>
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[Matplotlib-users] Bug in Triangulation causes infinite loop if 4 or more duplicate points are used in tricontour()

2012-04-16 Thread Kacper Kowalik
Hi,
I haven't been able to pin point it exactly but following script:

import matplotlib.pyplot as plt
import matplotlib.tri as tri
import numpy as np
from numpy.random import uniform, seed

seed(0)
npts = 200
x = uniform(-2,2,npts)
y = uniform(-2,2,npts)
z = x*np.exp(-x**2-y**2)

y[1:3] = x[0]  # 4 or more duplicate points make tricontour hang!!!
x[1:3] = y[0]
triang = tri.Triangulation(x, y)
plt.tricontour(x, y, z, 15, linewidths=0.5, colors='k')

plt.show()


causes infinite loop in _tri.so. It happens in matplotlib-1.1.0 as well
as git HEAD.
I understand that my input is not exactly valid, but I'd rather see MPL
die than occupy my box for eternity ;)
Best regards,
Kacper



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Re: [Matplotlib-users] Bug in Triangulation causes infinite loop if 4 or more duplicate points are used in tricontour()

2012-04-16 Thread Damon McDougall
Hi Kacper,

Just to be clear, is it tri.Triangulation(x, y) that hangs, or is it 
plt.tricontour(…)?  

--
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B2.39
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On Monday, 16 April 2012 at 14:28, Kacper Kowalik wrote:

> Hi,
> I haven't been able to pin point it exactly but following script:
>  
> import matplotlib.pyplot as plt
> import matplotlib.tri as tri
> import numpy as np
> from numpy.random import uniform, seed
>  
> seed(0)
> npts = 200
> x = uniform(-2,2,npts)
> y = uniform(-2,2,npts)
> z = x*np.exp(-x**2-y**2)
>  
> y[1:3] = x[0] # 4 or more duplicate points make tricontour hang!!!
> x[1:3] = y[0]
> triang = tri.Triangulation(x, y)
> plt.tricontour(x, y, z, 15, linewidths=0.5, colors='k')
>  
> plt.show()
>  
>  
> causes infinite loop in _tri.so. It happens in matplotlib-1.1.0 as well
> as git HEAD.
> I understand that my input is not exactly valid, but I'd rather see MPL
> die than occupy my box for eternity ;)
> Best regards,
> Kacper
>  
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Re: [Matplotlib-users] Bug in Triangulation causes infinite loop if 4 or more duplicate points are used in tricontour()

2012-04-16 Thread Kacper Kowalik
On 16 Apr 2012 22:31, "Damon McDougall"  wrote:
>
> Hi Kacper,
>
> Just to be clear, is it tri.Triangulation(x, y) that hangs, or is it
plt.tricontour(…)?

It's plt.tricontour that hangs, tri.Triangulation properly issues warning
about duplicates.
Cheers,
Kacper

> --
> Damon McDougall
> d.mcdoug...@warwick.ac.uk
> http://damon.is-a-geek.com
> B2.39
> Mathematics Institute
> University of Warwick
> Coventry
> West Midlands
> CV4 7AL
> United Kingdom
>
> On Monday, 16 April 2012 at 14:28, Kacper Kowalik wrote:
>>
>> Hi,
>> I haven't been able to pin point it exactly but following script:
>>
>> import matplotlib.pyplot as plt
>> import matplotlib.tri as tri
>> import numpy as np
>> from numpy.random import uniform, seed
>>
>> seed(0)
>> npts = 200
>> x = uniform(-2,2,npts)
>> y = uniform(-2,2,npts)
>> z = x*np.exp(-x**2-y**2)
>>
>> y[1:3] = x[0] # 4 or more duplicate points make tricontour hang!!!
>> x[1:3] = y[0]
>> triang = tri.Triangulation(x, y)
>> plt.tricontour(x, y, z, 15, linewidths=0.5, colors='k')
>>
>> plt.show()
>>
>>
>> causes infinite loop in _tri.so. It happens in matplotlib-1.1.0 as well
>> as git HEAD.
>> I understand that my input is not exactly valid, but I'd rather see MPL
>> die than occupy my box for eternity ;)
>> Best regards,
>> Kacper
>>
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Re: [Matplotlib-users] Bug in Triangulation causes infinite loop if 4 or more duplicate points are used in tricontour()

2012-04-16 Thread Damon McDougall
On Monday, 16 April 2012 at 16:34, Kacper Kowalik wrote:
>  
> On 16 Apr 2012 22:31, "Damon McDougall"  (mailto:d.mcdoug...@warwick.ac.uk)> wrote:
> >
> > Hi Kacper,
> >
> > Just to be clear, is it tri.Triangulation(x, y) that hangs, or is it 
> > plt.tricontour(…)?  
> It's plt.tricontour that hangs, tri.Triangulation properly issues warning 
> about duplicates.
> Cheers,
> Kacper  
> > On Monday, 16 April 2012 at 14:28, Kacper Kowalik wrote:
> >>
> >> Hi,
> >> I haven't been able to pin point it exactly but following script:
> >>
> >> import matplotlib.pyplot as plt
> >> import matplotlib.tri as tri
> >> import numpy as np
> >> from numpy.random import uniform, seed
> >>
> >> seed(0)
> >> npts = 200
> >> x = uniform(-2,2,npts)
> >> y = uniform(-2,2,npts)
> >> z = x*np.exp(-x**2-y**2)
> >>
> >> y[1:3] = x[0] # 4 or more duplicate points make tricontour hang!!!
> >> x[1:3] = y[0]
You should call z = x*np.exp(-x**2-y**2) _before_ changing the points you're 
triangulating.
Having said that, I see the same behaviour even if I change the vertices before 
I compute z.
> >> triang = tri.Triangulation(x, y)
> >> plt.tricontour(x, y, z, 15, linewidths=0.5, colors='k')
> >>
> >> plt.show()
> >>
> >>
> >> causes infinite loop in _tri.so. It happens in matplotlib-1.1.0 as well
> >> as git HEAD.
> >> I understand that my input is not exactly valid, but I'd rather see MPL
> >> die than occupy my box for eternity ;)
> >> Best regards,
> >> Kacper
I think the reason it's hanging is because you're trying to plot the contours 
of a function that is defined on an invalid triangulation (edges cross at 
points that are not in the vertex set). I think the best way to deal with this 
is to write a helper function to check the triangulation is valid. If it isn't, 
either tri.Triangulation(x, y) should fail, or the plotter should fail.

Anybody else have any suggestions?
  
--
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d.mcdoug...@warwick.ac.uk (mailto:d.mcdoug...@warwick.ac.uk)
http://damon.is-a-geek.com
B2.39
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Re: [Matplotlib-users] Latex primed regression?

2012-04-16 Thread Michael Droettboom

  
  
This bug was introduced in PR #54.  That tried to fix the behavior
of the apostrophe character, but inadvertently made primes smaller
as well.  The fix is revert prime to its old size, but make the
apostrophe equivalent to "^\prime".

Are you able to test the following pull request and ensure that it
resolves your issues?


https://github.com/matplotlib/matplotlib/pull/836

Mike

On 04/16/2012 10:13 AM, Alexander Wagner wrote:

  
  ps. my math-related rcParams are just the defaults, i think
  
  mathtext.cal : cursive
mathtext.rm  : serif
mathtext.tt  : monospace
mathtext.it  : serif:italic
mathtext.bf  : serif:bold
mathtext.sf  : sans
mathtext.fontset : cm 
mathtext.fallback_to_cm : True
mathtext.default : it 
  
  
  On 16/04/12 10:50 PM, Michael Droettboom wrote:
  
What is the math string you are using?  I can't seem to
reproduce this with:

   "$D_{40}\prime\prime$"

What are your math-related rcParams?

Mike

On 04/15/2012 08:53 PM, Alexander Wagner wrote:

   Dear Matplotlib
users,

Mathtext primed used to be rendered correctly in 1.0.0 like
so



But now they look tiny and badly spaced in 1.1.0 like so



I haven't tried with all fonts, but it is the case with
Bitstream Vera Sans and Helvetica. Can anyone confirm?

If I use the LaTeX renderer, it looks correct.

Many thanks,
Alex


  
  
  
  
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Re: [Matplotlib-users] Latex primed regression?

2012-04-16 Thread Alexander Wagner

  
  

Thanks, Mike, everything primed looks nice again.

Best wishes,
Alex


On 17/04/12 7:53 AM, Michael Droettboom wrote:

  
  This bug was introduced in PR #54.  That tried to fix the behavior
  of the apostrophe character, but inadvertently made primes smaller
  as well.  The fix is revert prime to its old size, but make the
  apostrophe equivalent to "^\prime".
  
  Are you able to test the following pull request and ensure that it
  resolves your issues?
  
  
  https://github.com/matplotlib/matplotlib/pull/836
  
  Mike
  
  On 04/16/2012 10:13 AM, Alexander Wagner wrote:
  

ps. my math-related rcParams are just the defaults, i think

mathtext.cal : cursive
  mathtext.rm  : serif
  mathtext.tt  : monospace
  mathtext.it  : serif:italic
  mathtext.bf  : serif:bold
  mathtext.sf  : sans
  mathtext.fontset : cm 
  mathtext.fallback_to_cm : True
  mathtext.default : it 


On 16/04/12 10:50 PM, Michael Droettboom wrote:

  What is the math string you are using?  I can't seem to
  reproduce this with:
  
     "$D_{40}\prime\prime$"
  
  What are your math-related rcParams?
  
  Mike
  
  On 04/15/2012 08:53 PM, Alexander Wagner wrote:
  
 Dear Matplotlib
  users,
  
  Mathtext primed used to be rendered correctly in 1.0.0
  like so
  
  
  
  But now they look tiny and badly spaced in 1.1.0 like so
  
  
  
  I haven't tried with all fonts, but it is the case with
  Bitstream Vera Sans and Helvetica. Can anyone confirm?
  
  If I use the LaTeX renderer, it looks correct.
  
  Many thanks,
  Alex
  
  




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