Re: [Matplotlib-users] Matplotlib-users Digest, Vol 51, Issue 24

  Jouni, I think you're right.
If I run LaTeX from the command line I get the error message:
warning: Could not open char translation file `cp8bit.tcx'.
This is e-TeX, Version 3.141592-2.1 (Web2C 7.5.2)
kpathsea: Running mktexfmt latex.efmt
fmtutil: unknown format type: latex.efmt.
I can't find the format file `latex.efmt'!


But if I run it from TeXShop it runs perfectly:
This is pdfTeX, Version 3.1415926-1.40.10 (TeX Live 2009)
  \write18 enabled.
entering extended mode

and----

~ Harry$ which latex
/usr/local/bin/latex

I don't know whether this is the right forum, but could you tell me how 
to fix this? I'm running OS X 10.6.4.

Thanks,
Harry

On 8/12/10 4:37 PM, mat...@li... wrote:
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> Today's Topics:
>
>     1. PNG without transparency (Miha Tom?i?)
>     2. TeX not working with Matplotlib (Harry Boer)
>     3. Re: TeX not working with Matplotlib (Jouni Sepp?nen)
>     4. Re: Hints on sizing plot elements? (Tony S Yu)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Thu, 12 Aug 2010 08:56:06 +0200
> From: Miha Tom?i?<mih...@gm...>
> Subject: [Matplotlib-users] PNG without transparency
> To: mat...@li...
> Message-ID:
> 	<AAN...@ma...>
> Content-Type: text/plain; charset="iso-8859-1"
>
> Hello!
>
> I am having trouble saving figures to PNG with Agg backend. The problem is I
> can't get a PNG without transparency even if I specify:
>
> fig.savefig("colorAgg.png", dpi=300, transparent=False)
>
> identify still indicates there is a 1-bit aplha channel present:
>
> Image: colorAgg.png
>   Format: PNG (Portable Network Graphics)
>   Class: DirectClass
>   Geometry: 390x300+0+0
>   Resolution: 118.11x118.11
>   Print size: 3.30201x2.54001
>   Units: PixelsPerCentimeter
>   Type: TrueColorMatte
>   Endianess: Undefined
>   Colorspace: RGB
>   Depth: 8-bit
>   Channel depth:
>     red: 8-bit
>     green: 8-bit
>     blue: 8-bit
>     alpha: 1-bit
>   Channel statistics:
>     red:
>       min: 0 (0)
>       max: 255 (1)
>       mean: 192.918 (0.756542)
>       standard deviation: 96.4001 (0.37804)
>     green:
>       min: 0 (0)
>       max: 255 (1)
>       mean: 189.457 (0.74297)
>       standard deviation: 98.0884 (0.38466)
>     blue:
>       min: 0 (0)
>       max: 255 (1)
>       mean: 177.814 (0.697309)
>       standard deviation: 107.593 (0.421932)
>     opacity:
>       min: 0 (0)
>       max: 0 (0)
>       mean: 0 (0)
>       standard deviation: 0 (0)
>   Histogram:
>      75477: (255,255,255,  0) #FFFFFF white
>       8184: (  9,106, 37,  0) #096A25 rgb(9,106,37)
>       8119: (113,170, 76,  0) #71AA4C rgb(113,170,76)
>       8119: (204,  0,  0,  0) #CC0000 rgb(204,0,0)
>       6655: (  0,  0,  0,  0) #000000 black
>       3466: (  1,  1,  1,  0) #010101 rgb(1,1,1)
>       2482: (106,106,106,  0) #6A6A6A rgb(106,106,106)
>        287: (  3, 44, 15,  0) #032C0F rgb(3,44,15)
>        285: ( 47, 71, 31,  0) #2F471F rgb(47,71,31)
>        285: ( 85,  0,  0,  0) #550000 rgb(85,0,0)
>        215: (  2,  2,  2,  0) #020202 rgb(2,2,2)
>        196: (116,116,116,  0) #747474 rgb(116,116,116)
> ...
> ----------------------------------------------------------------
>
> This is not a big deal but there si a problem when I insert this PNGs in PDF
> and there si a RGB/CMYK conversion on every page that contains transparent
> PNG.
>
> How can I get rid of the aplha channel completely? How do I tell the backend
> to work (or at least save) in pure RGB not in RGBA color space?
>
> Thanks and take care,
> Miha
> -------------- next part --------------
> An HTML attachment was scrubbed...
>
> ------------------------------
>
> Message: 2
> Date: Thu, 12 Aug 2010 09:46:41 +0200
> From: Harry Boer<h....@bc...>
> Subject: [Matplotlib-users] TeX not working with Matplotlib
> To: mat...@li...
> Message-ID:<4C6...@bc...>
> Content-Type: text/plain; charset="iso-8859-1"
>
>    Hi there,
>
> I'm trying to render text with LaTeX using the example on page 53 of the
> Matplotlib tutorial; see source code and output below.
> It's not working. divipng, (latest)Ghostscript, and LaTeX are all
> installed; their executables
> in my PATH. Matplotlib is working flawlessly. Help is appreciated.
> Thanks, Harry
>
> $gs
> GPL Ghostscript 8.71 (2010-02-10)
> Copyright (C) 2010 Artifex Software, Inc.  All rights reserved.
> This software comes with NO WARRANTY: see the file PUBLIC for details.
> GS>
>
> $dvipng
> This is dvipng 1.12 Copyright 2002-2008 Jan-Ake Larsson
>
>
> #EXAMPLE TUTORIAL page 53
> #!/Library/Frameworks/Python.framework/Versions/Current/bin/python
>
> from matplotlib import rc
> from numpy import arange, cos, pi
> from matplotlib.pyplot import figure, axes, plot, xlabel, ylabel, title, \
>        grid, savefig, show
>
>
> rc('text', usetex=True)
> rc('font', family='serif')
> figure(1, figsize=(6,4))
> ax = axes([0.1, 0.1, 0.8, 0.7])
> t = arange(0.0, 1.0+0.01, 0.01)
> s = cos(2*2*pi*t)+2
> plot(t, s)
>
> xlabel(r'\textbf{time (s)}')
> ylabel(r'\textit{voltage (mV)}',fontsize=16)
> title(r"\TeX\ is Number
> $\displaystyle\sum_{n=1}^\infty\frac{-e^{i\pi}}{2^n}$!",
>         fontsize=16, color='r')
> grid(True)
> savefig('tex_demo')
>
> show()
>
>
> ###OUTPUT#####
>
> warning: Could not open char translation file `cp8bit.tcx'.
> kpathsea: Running mktexfmt latex.efmt
> fmtutil: unknown format type: latex.efmt.
> Traceback (most recent call last):
>     File "tex.py", line 34, in<module>
>       savefig('tex_demo')
>     File
> "/Library/Frameworks/Python.framework/Versions/6.2/lib/python2.6/site-packages/matplotlib/pyplot.py",
> line 356, in savefig
>       return fig.savefig(*args, **kwargs)
>     File
> "/Library/Frameworks/Python.framework/Versions/6.2/lib/python2.6/site-packages/matplotlib/figure.py",
> line 1032, in savefig
>       self.canvas.print_figure(*args, **kwargs)
>     --------AND A LOT OF MORE OUTPUT LIKE THE ABOVE--------------
>       string:\n%s\nHere is the full report generated by LaTeX: \n\n'%
> repr(tex)) + report)
> RuntimeError: LaTeX was not able to process the following string:
> '$0.0$'
> Here is the full report generated by LaTeX:
>
> This is e-TeX, Version 3.141592-2.1 (Web2C 7.5.2)
> I can't find the format file `latex.efmt'!
>
>
> Harry
> -------------- next part --------------
> An HTML attachment was scrubbed...
>
> ------------------------------
>
> Message: 3
> Date: Thu, 12 Aug 2010 10:41:41 +0000 (UTC)
> From: Jouni Sepp?nen<jk...@ik...>
> Subject: Re: [Matplotlib-users] TeX not working with Matplotlib
> To: mat...@li...
> Message-ID:<loo...@po...>
> Content-Type: text/plain; charset=utf-8
>
> Harry Boer<h.boer@...>  writes:
>
>>          kpathsea: Running mktexfmt latex.efmt
>>          fmtutil: unknown format type: latex.efmt.
> Sounds like your LaTeX installation is broken. Can you run latex by hand? Is it
> the same binary that matplotlib ends up calling?
>
> Jouni Sepp?nen
>
>
>
>
>
> ------------------------------
>
> Message: 4
> Date: Thu, 12 Aug 2010 10:37:10 -0400
> From: Tony S Yu<ts...@gm...>
> Subject: Re: [Matplotlib-users] Hints on sizing plot elements?
> To: Russell E. Owen<ro...@uw...>
> Cc: mat...@li...
> Message-ID:<E1F...@gm...>
> Content-Type: text/plain; charset="us-ascii"
>
>
> On Aug 12, 2010, at 1:08 AM, Russell E. Owen wrote:
>
>> I'm making a strip chart widget (which I plan to make publicly available
>> when finished). The basics are working fine, but the automatic sizing is
>> not doing so well. Strip charts are typically short, and when suitably
>> short the X axis annotations are partially truncated.
>>
>> So...can I convince the automatic sizer to always show the full X (time)
>> axis annotations and put all the variable sizing into the data area? Or
>> do I have to manually set them somehow?
> As far as I know, there's nothing to automatically resize the padding around the the axes. (The manual way to do it is to call `fig.subplots_adjust`). I wrote a helper script (attached below) to adjust the layout so that there's a specified amount of padding around the axes.
>
> Unfortunately, this resizer doesn't function correctly when using the GTK backend. It apparently works fine with TkAgg, MacOSX, and Qt4Agg backends.
>
>
>> Also, is there a way from my software (not a .matplotlibrc file) to
>> globally make the default background color white for axis annotation
>> areas? Right now the background is gray for annotations and while for
>> plot area and I'd prefer it was all white.
>>
>> -- Russell
>
> Just set plt.rc('figure', facecolor='w') in your code (assuming you've imported matplotlib.pyplot as plt).
>
> Best,
> -Tony
>
>
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>
>
> Usage note: Since it sounds like you're not creating subplots, you can just use the `tight_borders` function, instead of the `tight_layout` function; the later requires two redraws while the first requires only one.
>
>
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> End of Matplotlib-users Digest, Vol 51, Issue 24
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