On 2014/06/17, 8:59 AM, Bruno Pace wrote: > Hi all, > > I'm trying to use imshow to plot some values which fall on the interval > [0,1]. I need to > use a logscale to emphasize the scales of the data. The solution I found > checking some discussions was like this > > plt.imshow(X, interpolation='none', norm=matplotlib.colors.LogNorm()) > > However, I notice that the way these colors are assigned are not always > the same (although my data always contains the minimum value 0.0 and > the maximum 1.0). I need to have a coherent color scale to indicate > the real values. Is it easier to do the color code myself? What is the > proper way of tackling this problem??
Use the vmin and vmax kwargs to LogNorm, remembering that vmin must be greater than zero for a log scale. Eric > > It's pretty much the same problem described here, but with a logscale... > > http://stackoverflow.com/questions/7875688/how-can-i-create-a-standard-colorbar-for-a-series-of-plots-in-python > > > Thank you very much! > > Bruno > > > ------------------------------------------------------------------------------ > HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions > Find What Matters Most in Your Big Data with HPCC Systems > Open Source. Fast. Scalable. Simple. Ideal for Dirty Data. > Leverages Graph Analysis for Fast Processing & Easy Data Exploration > http://p.sf.net/sfu/hpccsystems > > > > _______________________________________________ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > ------------------------------------------------------------------------------ HPCC Systems Open Source Big Data Platform from LexisNexis Risk Solutions Find What Matters Most in Your Big Data with HPCC Systems Open Source. Fast. Scalable. Simple. Ideal for Dirty Data. Leverages Graph Analysis for Fast Processing & Easy Data Exploration http://p.sf.net/sfu/hpccsystems _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
