Re: [Matplotlib-users] contourf problem

[Alan G I. <ala...@gm...>]

On 3/28/2010 3:04 PM, Ryan May wrote:
> it's just using indices, which run from 0 to 99. Since the limits
> are 0 to 100, bam...white space because, indeed, there is no data.
>    

OK, it's obvious one you point it out.
Sorry for the typo in the example.

Now suppose I want a colorbar labelled at -1, 0, 1
but the highest value realized is <1.  Can I somehow
use ticks=(-1,0,1) anyway, or do I have to tick at
the realized limits and then label "falsely".  Here's an
example, hopefully without typos this time.

x = np.linspace(-5, 5, 101)
y = x
Z = np.sin(x*y[:,None]).clip(-1,1-1E-6)
fig = plt.figure()
ax = fig.add_subplot(1,1,1)
cax = ax.imshow(Z, interpolation='nearest', extent=[-5,5,-5,5])
cbar = fig.colorbar(cax, ticks=(-1, 0, 1))

As you see, the top tick is not labelled.

Thanks,
Alan