[Matplotlib-users] problems importing matplotlib in macos
hi everyone, I run python 2.7.2. in Eclipse (recently upgraded from 2.6). I have a problem with installing matplotlib (I found the version for python 2.7. MacOs 10.3, no later versions). If I run python in terminal using arch -i386 python, and then from matplotlib.pylab import * and similar stuff, everything works fine. If I run python in eclipse or just without arch -i386, I can import matplotlib as from matplotlib import * but actually nothing gets imported. If I do it in the same way as above, I get the message no matching architecture in universal wrapper which means there's conflict of versions or something like that. I tried reinstalling the interpreter and adding matplotlib to forced built-ins, but nothing helped. For some reason I didn't have this problem with numpy and tkinter. Any suggestions are appreciated. -- View this message in context: http://old.nabble.com/problems-importing-matplotlib-in-macos-tp33037227p33037227.html Sent from the matplotlib - users mailing list archive at Nabble.com. -- Write once. Port to many. Get the SDK and tools to simplify cross-platform app development. Create new or port existing apps to sell to consumers worldwide. Explore the Intel AppUpSM program developer opportunity. appdeveloper.intel.com/join http://p.sf.net/sfu/intel-appdev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] contourf with rgba colours
On 12/27/11 12:07 PM, Logi Ragnarsson wrote: Hello, Is it supposed to be possible to do a filled contour plot with alpha levels in the colour map? I'm plotting weather data on top of maps and would very much like to plot low levels of wind and precipitation as mostly transparent, with higher levels more opaque. If I replace the meat of the plotting code with these two lines: basemap.bluemarble() basemap.contourf(x, y, precipitation, colors=colorConverter.to_rgba_array([ # no colour for zero - fully transparent (1,0,0,0.5), (0,1,0,1), (0,1,1,0.5), (0,0,1,1), (1,0,1,0.5) ]), levels=[ # no level for zero - fully transparent 0.001, 0.01, 0.1, 1, 10 ]) I end up with the (deliberately) pretty horrible looking plot in the attachment. The alpha values in the colors argument are completely ignored, but having no colour specified for values below 0.001 (mm/hr) causes those areas to be left transparent. I'm plotting the Blue Marble simply to have something visible under the weather plot. Is this supposed to work at all in any way? I'm using matplotlib 1.1.0 and basemap 1.0.2 on debian with the 'Agg' back-end. The data being plotted is a netCDF dataset read from the output of the WRF weather model. Regards, Logi Logi: It looks like alpha transparency is controlled with the alpha keyword, so you can't specify different alphas for each contour level. You may have to call contourf multiple times, changing the alpha as needed for each set of contour levels. -Jeff -- Write once. Port to many. Get the SDK and tools to simplify cross-platform app development. Create new or port existing apps to sell to consumers worldwide. Explore the Intel AppUpSM program developer opportunity. appdeveloper.intel.com/join http://p.sf.net/sfu/intel-appdev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
Re: [Matplotlib-users] contourf with rgba colours
On 12/27/2011 03:11 PM, Jeff Whitaker wrote: On 12/27/11 12:07 PM, Logi Ragnarsson wrote: Hello, Is it supposed to be possible to do a filled contour plot with alpha levels in the colour map? I'm plotting weather data on top of maps and would very much like to plot low levels of wind and precipitation as mostly transparent, with higher levels more opaque. If I replace the meat of the plotting code with these two lines: basemap.bluemarble() basemap.contourf(x, y, precipitation, colors=colorConverter.to_rgba_array([ # no colour for zero - fully transparent (1,0,0,0.5), (0,1,0,1), (0,1,1,0.5), (0,0,1,1), (1,0,1,0.5) ]), levels=[ # no level for zero - fully transparent 0.001, 0.01, 0.1, 1, 10 ]) I end up with the (deliberately) pretty horrible looking plot in the attachment. The alpha values in the colors argument are completely ignored, but having no colour specified for values below 0.001 (mm/hr) causes those areas to be left transparent. I'm plotting the Blue Marble simply to have something visible under the weather plot. Is this supposed to work at all in any way? I'm using matplotlib 1.1.0 and basemap 1.0.2 on debian with the 'Agg' back-end. The data being plotted is a netCDF dataset read from the output of the WRF weather model. Regards, Logi Logi: It looks like alpha transparency is controlled with the alpha keyword, so you can't specify different alphas for each contour level. You may have to call contourf multiple times, changing the alpha as needed for each set of contour levels. It looks like this is something I can fix by modifying ListedColormap. It is discarding the alpha values, and I don't think there is any reason it needs to do so. Eric -Jeff -- Write once. Port to many. Get the SDK and tools to simplify cross-platform app development. Create new or port existing apps to sell to consumers worldwide. Explore the Intel AppUpSM program developer opportunity. appdeveloper.intel.com/join http://p.sf.net/sfu/intel-appdev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users -- Write once. Port to many. Get the SDK and tools to simplify cross-platform app development. Create new or port existing apps to sell to consumers worldwide. Explore the Intel AppUpSM program developer opportunity. appdeveloper.intel.com/join http://p.sf.net/sfu/intel-appdev ___ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
