Thread: [Matplotlib-users] pcolormesh - question

Hi,

I have the following code:

    pylab.pcolormesh(data, multialignment='center')
    xlocs, xlabels = pylab.xticks(range(0, data.shape[1]+1), xlabels)
    pylab.setp(xlabels, 'rotation', 70)
    pylab.colorbar()
    pylab.show()

where data is a 2D numpy array containing some masked values and
'xlabels' is - originally - a list of strings for the xlabels.

This gives me two problems:
- The "column" on the right is shown as blank, although this column has
valid data and
- the labels aren't placed below the center of a field, but below the
xticks. I would like to have them centered, below a field, as the ticks
are merely separators and not associated with any unit.

TIA
Christian

Hi,

Let me reformulate my question: Is there a way to put ticklabels not
beside, but between ticks (centered between)?

TIA
Christian

On Fri, 2009-09-04 at 10:53 +0200, Christian Meesters wrote:
> Hi,
> 
> I have the following code:
> 
>     pylab.pcolormesh(data, multialignment='center')
>     xlocs, xlabels = pylab.xticks(range(0, data.shape[1]+1), xlabels)
>     pylab.setp(xlabels, 'rotation', 70)
>     pylab.colorbar()
>     pylab.show()
> 
> where data is a 2D numpy array containing some masked values and
> 'xlabels' is - originally - a list of strings for the xlabels.
> 
> This gives me two problems:
> - The "column" on the right is shown as blank, although this column has
> valid data and
> - the labels aren't placed below the center of a field, but below the
> xticks. I would like to have them centered, below a field, as the ticks
> are merely separators and not associated with any unit.
> 
> TIA
> Christian
> 
> 
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Christian Meesters wrote:
> Hi,
> 
> Let me reformulate my question: Is there a way to put ticklabels not
> beside, but between ticks (centered between)?

There is presently no clean mechanism for this.  A workaround is to use 
minor ticks centered between the major ticks, and label only the minor 
ticks (which could be set to zero length).  There was a thread on the 
list about this a couple weeks ago; I don't recall whether an example of 
this method was given then.

Eric

> 
> TIA
> Christian
> 
> On Fri, 2009-09-04 at 10:53 +0200, Christian Meesters wrote:
>> Hi,
>>
>> I have the following code:
>>
>>     pylab.pcolormesh(data, multialignment='center')
>>     xlocs, xlabels = pylab.xticks(range(0, data.shape[1]+1), xlabels)
>>     pylab.setp(xlabels, 'rotation', 70)
>>     pylab.colorbar()
>>     pylab.show()
>>
>> where data is a 2D numpy array containing some masked values and
>> 'xlabels' is - originally - a list of strings for the xlabels.
>>
>> This gives me two problems:
>> - The "column" on the right is shown as blank, although this column has
>> valid data and
>> - the labels aren't placed below the center of a field, but below the
>> xticks. I would like to have them centered, below a field, as the ticks
>> are merely separators and not associated with any unit.
>>
>> TIA
>> Christian
>>
>>
>> ------------------------------------------------------------------------------
>> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day 
>> trial. Simplify your report design, integration and deployment - and focus on 
>> what you do best, core application coding. Discover what's new with 
>> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
>> _______________________________________________
>> Matplotlib-users mailing list
>> Mat...@li...
>> https://lists.sourceforge.net/lists/listinfo/matplotlib-users
> 
> 
> ------------------------------------------------------------------------------
> Let Crystal Reports handle the reporting - Free Crystal Reports 2008 30-Day 
> trial. Simplify your report design, integration and deployment - and focus on 
> what you do best, core application coding. Discover what's new with 
> Crystal Reports now.  http://p.sf.net/sfu/bobj-july
> _______________________________________________
> Matplotlib-users mailing list
> Mat...@li...
> https://lists.sourceforge.net/lists/listinfo/matplotlib-users