Re: [Matplotlib-users] images and colorbars and image.set_data()

I don't know if it something wanted but it's very useful for me. For 
example sometime to improve the contrast between two values, I plot the 
log of the image but I don't want the value of the colorbar in log but 
linear or another sample (problably not good but I didn't find any other 
way to do it), I want plot the data from yellow to red, I'm using the 
hot colormat to do it but I didn't find any way to do the opposite so I 
began by plotting the data with the normal value, I plot the colorbar 
and I plot another time the opposite of the data, after with gimp I turn 
the colorbar and my scale is ok.

It's bad and dirty but it's working. I didn't find any otther way to do 
it properly.

N.

Jon Fox wrote:
> I've been working on a matplotlib embedded gtk app that updates an image
> (made with imshow) with a colorbar and I've noticed that although I can
> update the image with an image.set_data(new_array) that the colormapping
> and colorbar don't change. Is this the intended behaviour?  I guess it
> makes perfect sense if the image doesn't change much. 
>
> I am using a figure.clear() and a completely new axes.imshow() each time
> I redraw the plot. 
>
> -- Jon
>
>
>