[EMAIL PROTECTED] wrote:
> Le lundi 16 octobre 2006 15:55, Eric Firing a écrit :
>> [EMAIL PROTECTED] wrote:
>>> I thing there are a small problem with contour.
>>>
>>> import pyfits
>>> import pylab
>>> data = pyfits.getdata('test.fits')
>>> pylab.imshow(data,cmap=cm.gray)
>>> pylab.contour(data)
>>> #to have the result wanted:
>>> pylab.contour(data,origin='upper')
>>> pylab.show()
>>>
>>> not sure that it's something did in purpose.
>> It is intentional, not a bug. See examples/contour_image.py
>>
>> Eric
>
> So that means that contour does have origin set a lower by default when
> imshow
> is set at upper? If it's intentional I'll note it but I'm must admit that I
> have a problem with the logic.
It is more a matter of convention than logic. To the extent that there
is logic, it might run like this:
An image is a string of bytes representing pixels arranged like letters
in text, starting from the upper left.
When no explicit X and Y vectors are given, contour and pcolor are
implicitly using the array indices as X and Y.
Eric
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