[Matplotlib-users] WebP support
Hi all, just curious - is the WebP format supported by matplotlib ? Nils http://code.google.com/intl/de-DE/speed/webp/ -- Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] WebP support
"Nils Wagner" writes: > just curious - is the WebP format supported by matplotlib No. It seems to be a method for lossy compression of photographs and therefore not likely to be useful for line drawings - or what did you have in mind? -- Jouni K. Seppänen http://www.iki.fi/jks -- Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] imshow() and a transparent colormap?
On Fri, Oct 1, 2010 at 5:38 PM, Stan West wrote: > *From:* Nicolas Bigaouette [mailto:nbigaoue...@gmail.com] > *Sent:* Thursday, September 30, 2010 18:00 > > What I would like to do it have a colormap which is transparent for lower > values of data and opaque for high values, so the blue on the figure would > appear white/transparent. > > Would it suffice for the colormap to be light or white for low values but > still opaque? There are several built-in maps [1] with a light color at one > end; if it's light at the high end, append "_r" to the colormap name to get > the reversed version. > > [1] > http://matplotlib.sourceforge.net/examples/pylab_examples/show_colormaps.html > I guess it's the best solution for now. Thanks ;) -- Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] WebP support
On Sat, Oct 2, 2010 at 7:28 AM, Jouni K. Seppänen wrote: > "Nils Wagner" writes: > > > just curious - is the WebP format supported by matplotlib > > No. It seems to be a method for lossy compression of photographs and > therefore not likely to be useful for line drawings - or what did you > have in mind? > > -- > Jouni K. Seppänen > http://www.iki.fi/jks > > > And yet, we still allow for saving to jpegs. Also, matplotlib is also able to do imshow(), pcolor() and other rasterized drawings, so we aren't restricted to just line drawings. Nils, the answer is "no, we don't support webp -- yet". There is no reason why we can't eventually do so, and patches will always be welcomed. I just wouldn't expect it anytime soon. Ben Root -- Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] imshow() and a transparent colormap?
On Sat, Oct 2, 2010 at 10:37 AM, Nicolas Bigaouette wrote: > On Fri, Oct 1, 2010 at 5:38 PM, Stan West wrote: > >> *From:* Nicolas Bigaouette [mailto:nbigaoue...@gmail.com] >> *Sent:* Thursday, September 30, 2010 18:00 >> >> What I would like to do it have a colormap which is transparent for lower >> values of data and opaque for high values, so the blue on the figure would >> appear white/transparent. >> >> Would it suffice for the colormap to be light or white for low values but >> still opaque? There are several built-in maps [1] with a light color at one >> end; if it's light at the high end, append "_r" to the colormap name to get >> the reversed version. >> >> [1] >> http://matplotlib.sourceforge.net/examples/pylab_examples/show_colormaps.html >> > I guess it's the best solution for now. Thanks ;) > > > Nicolas, It would be extremely useful if you could file a feature request for this at our tracker: http://sourceforge.net/tracker/?atid=560723&group_id=80706&func=browse This way, your suggestion won't get lost. Ben Root -- Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] WebP support
On Sat, Oct 2, 2010 at 11:58 AM, Benjamin Root wrote: > On Sat, Oct 2, 2010 at 7:28 AM, Jouni K. Seppänen wrote: >> >> "Nils Wagner" writes: >> >> > just curious - is the WebP format supported by matplotlib >> >> No. It seems to be a method for lossy compression of photographs and >> therefore not likely to be useful for line drawings - or what did you >> have in mind? > > And yet, we still allow for saving to jpegs. Only some of the non-agg backends support saving to jpegs. Whenever someone posts to the list asking why jpegs are not supported, the answer is that, aside from not being supported by agg, lossy formats like jpeg are a poor choice for saving line art. Darren -- Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] WebP support
On Sat, Oct 2, 2010 at 11:54 AM, Darren Dale wrote: > On Sat, Oct 2, 2010 at 11:58 AM, Benjamin Root wrote: > > On Sat, Oct 2, 2010 at 7:28 AM, Jouni K. Seppänen wrote: > >> > >> "Nils Wagner" writes: > >> > >> > just curious - is the WebP format supported by matplotlib > >> > >> No. It seems to be a method for lossy compression of photographs and > >> therefore not likely to be useful for line drawings - or what did you > >> have in mind? > > > > And yet, we still allow for saving to jpegs. > > Only some of the non-agg backends support saving to jpegs. Whenever > someone posts to the list asking why jpegs are not supported, the > answer is that, aside from not being supported by agg, lossy formats > like jpeg are a poor choice for saving line art. > > Heh, I never noticed that. On this computer, I use TkAgg, and it worked just fine. Admittedly, I haven't tried this out much because I usually use png or one of the vector-based formats. Ben Root -- Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] WebP support
Benjamin Root writes: > And yet, we still allow for saving to jpegs. Wow, I didn't know. Last time I tried that I got a traceback, and assumed that it was not supported exactly because jpeg is a nonsensical format for most graphs. I just tried again, and got "TypeError: 'int' object is unsubscriptable" from PIL/JpegImagePlugin.pyc in _save(im, fp, filename). I suppose this doesn't get much testing. > Also, matplotlib is also able to do imshow(), pcolor() and other > rasterized drawings, so we aren't restricted to just line drawings. Yes, I guess there are some circumstances in which this would make sense. Would supporting WebP require new library dependencies? -- Jouni K. Seppänen http://www.iki.fi/jks -- Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
[Matplotlib-users] postscript fonts: examples in matplotlib
All, I am wondering if anyone knows of a working example that yields a postscript figure editable in Adobe Illustrator; that is, the characters are editable as characters. I have only been able to get drawn fonts and would love to have a test case that is known to work. My environment is: > python Python 2.6.6 (r266:84292, Sep 11 2010, 15:25:14) [GCC 4.2.1 (Apple Inc. build 5659)] on darwin Type "help", "copyright", "credits" or "license" for more information. >>> import matplotlib >>> matplotlib.__version__ '1.0.0' >>> matplotlib.__file__ '/opt/local/Library/Frameworks/Python.framework/Versions/2.6/lib/python2.6/site-packages/matplotlib/__init__.pyc' >>> my rc file is: backend : TkAgg # the default backend interactive : True ps.usedistiller : xpdf I can produce postscript fonts outside python, say in IDL. I can produce postscript fonts in python using the psg package, but not matplotlib. In all the examples at http://matplotlib.sourceforge.net/ I did not find anything that explicitly addresses this issue. Thanks to anyone who answers with a test case. -- Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] WebP support
On Sat, Oct 2, 2010 at 12:39 PM, Jouni K. Seppänen wrote: > Benjamin Root writes: > > > And yet, we still allow for saving to jpegs. > > Wow, I didn't know. Last time I tried that I got a traceback, and > assumed that it was not supported exactly because jpeg is a nonsensical > format for most graphs. > > I just tried again, and got "TypeError: 'int' object is unsubscriptable" > from PIL/JpegImagePlugin.pyc in _save(im, fp, filename). I suppose this > doesn't get much testing. > > Yeah, I just double-checked which backend I was using and it turned out to be GTKAgg (I forgot that I changed it at one point for a test). In TkAgg, I get the same error message you report. > > Also, matplotlib is also able to do imshow(), pcolor() and other > > rasterized drawings, so we aren't restricted to just line drawings. > > Yes, I guess there are some circumstances in which this would make > sense. Would supporting WebP require new library dependencies? > > -- > Jouni K. Seppänen > http://www.iki.fi/jks > > I am certainly not an expert, but it would appear that we offload a lot of the file-format stuff to PIL anyway. So, if PIL ever supports WebP, then I would imagine (although I could be wrong) that it would be fairly trivial to add support to WebP at least to whereever we support JPEG. Ben Root -- Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] WebP support
It's really not clear to me why we would want to lower the quality of our graphs to save Google's bandwidth bills. Because that's all this is... Cheers, G -- -Original Message- From: "Nils Wagner" Date: Sat, 02 Oct 2010 12:59:12 To: Subject: [Matplotlib-users] WebP support Hi all, just curious - is the WebP format supported by matplotlib ? Nils http://code.google.com/intl/de-DE/speed/webp/ -- Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] WebP support
On Sat, Oct 2, 2010 at 7:39 PM, Jouni K. Seppänen wrote: >> And yet, we still allow for saving to jpegs. > > Wow, I didn't know. Last time I tried that I got a traceback, and > assumed that it was not supported exactly because jpeg is a nonsensical > format for most graphs. Don't forget MPL is also capable of dealing with photographs, and it is really useful. I am currently working in two scientific projects based on this capability, and for some issues could be useful to save JPGs. -- Start uncovering the many advantages of virtual appliances and start using them to simplify application deployment and accelerate your shift to cloud computing. http://p.sf.net/sfu/novell-sfdev2dev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
