colorbar tick labeling

Community matplotlib-users
1

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.

2

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()

3

2008/11/21 Eric Firing <efiring@...202...>:

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