On 2012/11/26 12:18 PM, TP wrote: > On Monday, November 26, 2012 12:06:40 Eric Firing wrote: >> I'm glad you found a solution, but my sense is that the problem is that >> you are trying to make the colormap do the work of the norm. The >> colormap is just a set of discrete colors, with a linear mapping to the >> 0-1 scale (apart from the special under, over, and invalid values). The >> norm is for mapping your data to those colors, however you like, by >> mapping your data to the 0-1 range (again with possible under, over, and >> invalid values). Did you consider making a custom norm instead of >> modifying the colormap? > > Yes, I did. > The problem with the default colormap is that it has not enough colors. I have > found (I may be wrong) that no norm can change this state of affair. If you > are > able to find a norm to make my example work, i.e. to obtain the middle point > in > blue when large_value is for example 1e10, I am interested.
But how many colors can you actually distinguish on the screen, or in a plot? My impression is that the problem is not lack of colors, but rather mapping to the color you want. There is no reason that having a value in your *data* of 1e10 has to affect how numbers in your data over a "normal" range are mapped. You are trying to illustrate the problem with an example using 3 colors, so how can the number of colors in the colormap be the fundamental limitation? Eric > > TP > > ------------------------------------------------------------------------------ > Monitor your physical, virtual and cloud infrastructure from a single > web console. Get in-depth insight into apps, servers, databases, vmware, > SAP, cloud infrastructure, etc. Download 30-day Free Trial. > Pricing starts from $795 for 25 servers or applications! > http://p.sf.net/sfu/zoho_dev2dev_nov > _______________________________________________ > Matplotlib-users mailing list > Matplotlib-users@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/matplotlib-users > ------------------------------------------------------------------------------ Monitor your physical, virtual and cloud infrastructure from a single web console. Get in-depth insight into apps, servers, databases, vmware, SAP, cloud infrastructure, etc. Download 30-day Free Trial. Pricing starts from $795 for 25 servers or applications! http://p.sf.net/sfu/zoho_dev2dev_nov _______________________________________________ Matplotlib-users mailing list Matplotlib-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/matplotlib-users
