Re: [Matplotlib-users] Matplotlib & Basemap / What is the Best Graphical Back-end for Raster Data Display (.png) ?

[Claude Falbriard]

Dear colleagues, 

Yes, I've downloaded the latest stable image of Matplotlib source from the 
pypi repository matplotlib-1.5.1.tar.gz, running the commands: sudo python 
setup.py build and sudo python setup.py install. 

When executing larger plots, the Agg crashes with a segmentation fault 
message. My guess is that the c header files are not compiled with the 
correct platform setting (s390x).  Is there a way to rebuild 
the c prerequisites used by the embedded Agg framework? 

Thanks in advance for your advice. 

Regards,

Claude Falbriard
Certified IT Specialist L2 - Middleware


Phone: 55-13-99662-5703 | Mobile: 55-13-98117-3316
E-mail: clau...@br.ibm.com




From:   Benjamin Root <ben.v.r...@gmail.com>
To:     Claude Falbriard/Brazil/IBM@IBMBR
Cc:     Matplotlib Users <matplotlib-users@lists.sourceforge.net>
Date:   03/03/2016 11:44
Subject:        Re: [Matplotlib-users] Matplotlib & Basemap / What is the 
Best Graphical Back-end for Raster Data Display (.png) ?



Matplotlib will not work at all without AGG. Even the AGG-less backends 
still use AGG for image handling (imshow() and such).

We can not guarantee that matplotlib would work with agg 2.5, as that is 
the GPL'ed version. We develop against a patched 2.4 branch of AGG (which 
is BSD-licensed), which is distributed with our source, and is built as 
part of our build process. Have you tried building matplotlib directly 
from our source without a system install of AGG?

Cheers
Ben Root


On Thu, Mar 3, 2016 at 6:34 AM, Claude Falbriard <clau...@br.ibm.com> 
wrote:
Dear colleagues, 

I like to receive an advice about the best back-end choice for Matplotlib 
& Basemap to generate large .png images in a background processing mode. 
Having issues with the pre-compiled "Agg" package which does not work 
under my machine architecture. Also not able to recompile the Agg 2.5 
package as its build throws an error at the build script autogen.sh. 
Error:  

./configure: line 15546: syntax error near unexpected token 
`$SDL_VERSION,'
./configure: line 15546: `AM_PATH_SDL($SDL_VERSION,'

When bypassing this line it runs into another dependency which is blocking 
the make install process.
  
libtool: link: cannot find the library 
`../src/platform/X11/libaggplatformX11.la' or unhandled argument 
`../src/platform/X11/libaggplatformX11.la'
Makefile:1166: recipe for target 'aa_demo' failed
make[1]: *** [aa_demo] Error 1
make[1]: Leaving directory '/data/Downloads/agg/agg-2.5/examples'
Makefile:481: recipe for target 'install-recursive' failed
make: *** [install-recursive] Error 1

I do not plan to use any interactive access, so my guess is that excluding 
X11 libraries should work OK.  

My test showed that the  "Cairo" package is working fine, but its quality 
(vector oriented) is not as good compared to the Agg raster display. Case 
the "Agg" 
is not able to install on my machine, is there an alternate graphical 
back-end available under SuSE environments?  

Regards,

Claude Falbriard
Certified IT Specialist L2 - Middleware


Phone:55-13-99662-5703 | Mobile:55-13-98117-3316
E-mail: clau...@br.ibm.com



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