[Matplotlib-users] exporting with alpha channel, mathtext, contour labels
Hi all,
Just created a a diagram as the overlay of a pcolor plot with a
labelled contour plot. I had a few issues:
When exporting the following image, which is a pcolor plot with
alpha=0.15 and contours on top, I get no alpha channel in the resulting
output, regard of whether I export as EPS or SVG. Is exporting with
alpha channel not supported in those formats?
In the titles, which are generated using mathtext strings, I
can't get spaces in the captions. I checked the manual. Here is an
example of what I typed: pylab.xlabel(r"$\it{Mass flowrate,
}\rm{\dot{m} (kg/s)}$")
A couple of misaligned contour labels (eg '27' in the below)
Any suggestions?
This is with the latest Matplotlib 0.87.3, Python 2.4, ubuntu 6.06.
Cheers
JP
--
John Pye
Department of Mechanical and Manufacturing Engineering
University of New South Wales, Sydney, Australia
http://pye.dyndns.org/
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Re: [Matplotlib-users] exporting with alpha channel, mathtext, contour labels
On 6/19/06, John Pye <[EMAIL PROTECTED]> wrote:
Just created a a diagram as the overlay of a pcolor plot with a
labelled contour plot. I had a few issues:
When exporting the following image, which is a pcolor plot with
alpha=0.15 and contours on top, I get no alpha channel in the resulting
output, regard of whether I export as EPS or SVG. Is exporting with
alpha channel not supported in those formats?Alpha blending is not supported in Postscript (i.e. EPS). However, SVG can support it and it does appear to be implemented for the drawing of lines in the SVG backend. Why it does not work, I can't say.
In the titles, which are generated using mathtext strings, I
can't get spaces in the captions. I checked the manual. Here is an
example of what I typed: pylab.xlabel(r"$\it{Mass flowrate,
}\rm{\dot{m} (kg/s)}$")You will need to escape the spaces in TeX mode, i.e. '\ '
A couple of misaligned contour labels (eg '27' in the below)From understanding, this issue has always been problematical. A fair amount of time was spent on trying to get it right. The developer(s) may be able to expand on this.
Any suggestions?
This is with the latest Matplotlib 0.87.3, Python 2.4, ubuntu 6.06.
Nice plot! -- Paul
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Re: [Matplotlib-users] exporting with alpha channel, mathtext, contour labels
On Monday 19 June 2006 4:11 am, John Pye wrote: > Hi all, > > Just created a a diagram as the overlay of a pcolor plot with a labelled > contour plot. I had a few issues: > > When exporting the following image, which is a pcolor plot with alpha=0.15 > and contours on top, I get no alpha channel in the resulting output, regard > of whether I export as EPS or SVG. Is exporting with alpha channel not > supported in those formats? Alpha should be supported in svg, but there is no support for alpha in postscript. This is a problem with postscript, not mpl. Darren ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] legend not in front
Thanks John. The latest svn works beautifully for me now. No more svn updates for me until my thesis is submitted. Ryan On 6/18/06, John Hunter <[EMAIL PROTECTED]> wrote: > > "Ryan" == Ryan Krauss <[EMAIL PROTECTED]> writes: > > Ryan> I just did a fresh svn checkout and my legends are no longer > Ryan> in the front. The following lines produce the attached > Ryan> plot: > > > Hey Ryan, > > Not sure how or why this bug crept in, but apparently legend was > missing a zorder. I just added a default zorder value, which fixes > this problem. Thanks for the report. > > JDH > ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] legend not in front
> "Ryan" == Ryan Krauss <[EMAIL PROTECTED]> writes: Ryan> Thanks John. The latest svn works beautifully for me now. Ryan> No more svn updates for me until my thesis is submitted. Uh huh, just like the man who says no more drinks for me until my thesis is submitted. You know you can't resist :-) JDH ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] exporting with alpha channel, mathtext, contour labels
> "John" == John Pye <[EMAIL PROTECTED]> writes: John> issues: 1. When exporting the following image, which is a John> pcolor plot with alpha=0.15 and contours on top, I get no John> alpha channel in the resulting output, regard of whether I John> export as EPS or SVG. Is exporting with alpha channel not John> supported in those formats? 2. In the titles, which are For some reason I did not get the sample image, but could you provide some example code that replicates the alpha problem on the SVG backend? As others have noted, PS doesn't have an alpha channel so there is nothing we can do there, but SVG *should* work. Are you sure it's not your SVG viewer? JDH ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] fill without label
Hi,Does anyone know how to use the fill command without a label appearing in the legend box?I have something like this: plot(x, y, label = 'label1') fill(fx, fy) legend(loc = 'best')I thought this might work: fill(fx, fy, label = None)but I get this error instead: raise TypeError('text must be a string type')TypeError: text must be a string typeAny suggestions?thanks,a
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Re: [Matplotlib-users] fill without label
> "aonghus" == aonghus <[EMAIL PROTECTED]> writes: aonghus> Hi, Does anyone know how to use the fill command without aonghus> a label appearing in the legend box? aonghus> Any suggestions? >From the legend docstring if label is set to '_nolegend_', the item will not be shown in legend. JDH ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] fill without label
thanks for the suggestion- that works as expected: fill(fx, fy, label = '_nolegend_')aJohn Hunter <[EMAIL PROTECTED]> wrote: > "aonghus" == aonghus <[EMAIL PROTECTED]> writes:aonghus> Hi, Does anyone know how to use the fill command withoutaonghus> a label appearing in the legend box?aonghus> Any suggestions?From the legend docstring if label is set to '_nolegend_', the item will not be shown in legend.JDH Ring'em or ping'em. Make PC-to-phone calls as low as 1¢/min with Yahoo! Messenger with Voice.___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] exporting with alpha channel, mathtext, contour labels
Hi John
Here's a test script that gives the wrongly exported SVG image. I'm
viewing with EOG. When I edit to add "style="opacity:0.15"" it works
fine, so there's no prob with EOG.
from pylab import *
import matplotlib.numerix.ma as ma
from matplotlib.colors import ListedColormap
A = flipud(array([[1,2,3,4,5],[1,3,4,5,6],[1,1,4,5,7]]))
M = where(A==1,1,0)
B = ma.array(A,mask=M)
C = ListedColormap(['r','#FF00FF','y','g','b','#00'])
x = [0,5,10,15,20]
y = [0,5,10]
X,Y = meshgrid(x,y)
X = ma.array(X,mask=B.mask())
Y = ma.array(Y,mask=B.mask())
figure()
pcolor(X,Y,B,alpha=0.15,shading='flat',cmap=C)
hold(True)
contour(x,y,B)
xlabel('something')
ylabel('else')
Cheers
JP
John Hunter wrote:
>> "John" == John Pye <[EMAIL PROTECTED]> writes:
>>
>
> John> issues: 1. When exporting the following image, which is a
> John> pcolor plot with alpha=0.15 and contours on top, I get no
> John> alpha channel in the resulting output, regard of whether I
> John> export as EPS or SVG. Is exporting with alpha channel not
> John> supported in those formats? 2. In the titles, which are
>
>
> For some reason I did not get the sample image, but could you provide
> some example code that replicates the alpha problem on the SVG
> backend? As others have noted, PS doesn't have an alpha channel so
> there is nothing we can do there, but SVG *should* work. Are you sure
> it's not your SVG viewer?
>
> JDH
>
>
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>
--
John Pye
Department of Mechanical and Manufacturing Engineering
University of New South Wales, Sydney, Australia
http://pye.dyndns.org/
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[Matplotlib-users] updated Ubuntu Dapper packages for numpy, matplotlib, and scipy online
I have updated the apt repository I maintain for Ubuntu's Dapper, which now includes: numpy matplotlib scipy Each package is from a recent SVN checkout and should thus be regarded as "bleeding edge". The repository has a new URL: http://debs.astraw.com/dapper/ I intend to keep this repository online for an extended duration. If you want to put this repository in your sources list, you need to add the following lines to /etc/apt/sources.list:: deb http://debs.astraw.com/ dapper/ deb-src http://debs.astraw.com/ dapper/ I have not yet investigated the use of ATLAS in building or using the numpy binaries, and if performance is critical for you, please evaluate speed before using it. I intend to visit this issue, but I cannot say when. The Debian source packages were generated using stdeb, [ http://stdeb.python-hosting.com/ ] a Python to Debian source package conversion utility I wrote. stdeb does not build packages that follow the Debian Python Policy, so the packages here may be slighly unusual compared to Python packages in the official Debian or Ubuntu repositiories. For example, example scripts do not get installed, and no documentation is installed. Future releases of stdeb may resolve these issues. As always, feedback is very appreciated. Cheers! Andrew ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] usetex: different fonts
Ryan Krauss wrote: > Sorry, I didn't scroll down low enough in the message to see the png > you already attached. > > Ryan > The latest update (Darren's mail) makes the plots (exponents etc.) look just cool. Thanks! cheers, steve -- Random number generation is the art of producing pure gibberish as quickly as possible. ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
