Re: [Matplotlib-users] logarithmic imshow

[Jean-Luc M. <jea...@fr...>]

> It already exists:
> 
> gca().set_yscale('log')

Thank you  vrey much for the answer but I was probably not clear : What 
I want to do is to have a logarithmic color scaling (ie zcale).

However I tried your method (it may be useful) :

import MLab,Numeric,pylab
a=Numeric.resize(MLab.rand(900),[30,30])
b=a
pylab.imshow(b)
pylab.gca().set_yscale('log')

but I obtain  an error message :
ValueError: Cannot set nonpositive limits with log transform

Jean-Luc Menut