matplotlib-users

[Matplotlib-users] colorbar tick labeling

[Michael O. <mou...@de...>]

I was wondering if it is possible to change the colorbar tick labeling in 
matplotlib from numeric to text. Essentially, I want the colorbar to be a 
qualitative indicator; in the jet scheme, I'd like blue to be labeled 
as 'unstable', green as 'neutral', and red as 'stable'. I can change it so I 
just show the underlying values - colorbar(ticks = (-1, 0, 1)), but I cannot 
change the the tick labels to text. Is there any way to accomplish this? 
Thanks in advance for any help.

Re: [Matplotlib-users] colorbar tick labeling

[Eric F. <ef...@ha...>]

Michael Outhouse wrote:
> I was wondering if it is possible to change the colorbar tick labeling in 
> matplotlib from numeric to text. Essentially, I want the colorbar to be a 
> qualitative indicator; in the jet scheme, I'd like blue to be labeled 
> as 'unstable', green as 'neutral', and red as 'stable'. I can change it so I 
> just show the underlying values - colorbar(ticks = (-1, 0, 1)), but I cannot 
> change the the tick labels to text. Is there any way to accomplish this? 
> Thanks in advance for any help.

Your message came more than a month ago, but it looks like no one 
answered, so here is an answer:

with ipython -pylab:

imshow(2*rand(10,10) - 1, vmin=-1, vmax=1)
cbar = colorbar(ticks=[-1,0,1])
cbar.ax.set_yticklabels(['unstable', 'neutral', 'stable'])
draw()

Re: [Matplotlib-users] colorbar tick labeling

[Scott S. <sco...@gm...>]

2008/11/21 Eric Firing <ef...@ha...>:
> Michael Outhouse wrote:
>> I was wondering if it is possible to change the colorbar tick labeling in
>> matplotlib from numeric to text. Essentially, I want the colorbar to be a
>> qualitative indicator; in the jet scheme, I'd like blue to be labeled
>> as 'unstable', green as 'neutral', and red as 'stable'. I can change it so I
>> just show the underlying values - colorbar(ticks = (-1, 0, 1)), but I cannot
>> change the the tick labels to text. Is there any way to accomplish this?
>> Thanks in advance for any help.
>
> Your message came more than a month ago, but it looks like no one
> answered, so here is an answer:
>
> with ipython -pylab:
>
> imshow(2*rand(10,10) - 1, vmin=-1, vmax=1)
> cbar = colorbar(ticks=[-1,0,1])
> cbar.ax.set_yticklabels(['unstable', 'neutral', 'stable'])
> draw()

Also see the example here
http://matplotlib.sourceforge.net/examples/pylab_examples/colorbar_tick_labelling_demo.html.

Cheers,
Scott