Re: [Matplotlib-users] Difficulty with colorbar

[David T. <dl...@ca...>]

Managed to solve the problem now.

David

David Trethewey wrote:
> I think I realised what I was doing wrong, I didn't have the imshow() 
> call beforehand in my program:
>
> But using the code:
>
>     cax = fig.add_axes([0.85, 0.1, 0.075, 0.8])
>     a=outer(arange(0,1,0.01),ones(10))
>     imshow(a,aspect='auto',cmap=cm.gray,origin='lower')
>
> I get a set of axes from 0 to 10 in the x direction and 0 to 100 in 
> y.How do I get rid of the x axis and scale the y axis from 0 to 1.
>
> David
>
> David Trethewey wrote:
>   
>> I've been trying to add a colorbar to my figure and have used the 
>> following code;
>>
>> cax = axes([0.85, 0.1, 0.075, 0.8])
>> colorbar(cax=cax)
>>
>> as a template (from 
>> http://matplotlib.sourceforge.net/examples/pylab_examples/subplots_adjust.html)
>>
>> However I get an error:
>>
>> Traceback (most recent call last):
>>   File "cornwall2.py", line 640, in <module>
>>     
>> draw_parishes(n_parishes,m_parishes,preoccratio_parishes,0,nthroot,scaling)
>>   File "cornwall2.py", line 112, in draw_parishes
>>     colorbar(cax=cax)
>>   File 
>> "c:\python25\lib\site-packages\matplotlib-0.98.3.0001-py2.5-win32.egg\matplotlib\pyplot.py", 
>> line 1295, in colorbar
>>     ret = gcf().colorbar(mappable, cax = cax, ax=ax, **kw)
>>   File 
>> "c:\python25\lib\site-packages\matplotlib-0.98.3.0001-py2.5-win32.egg\matplotlib\figure.py", 
>> line 977, in colorbar
>>     cb = cbar.Colorbar(cax, mappable, **kw)
>>   File 
>> "c:\python25\lib\site-packages\matplotlib-0.98.3.0001-py2.5-win32.egg\matplotlib\colorbar.py", 
>> line 595, in __init__
>>     mappable.autoscale_None() # Ensure mappable.norm.vmin, vmax
>> AttributeError: 'NoneType' object has no attribute 'autoscale_None'
>>
>>
>> How am I using colorbar incorrectly?
>>
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>
>
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