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.
Thanks,
N.
test.fits (81.6 KB)
humufr@...136... 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.
N.
Le lundi 16 octobre 2006 15:55, Eric Firing a écrit :
humufr@...136... 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
humufr@...136... 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
Le lundi 16 octobre 2006 15:55, Eric Firing a écrit :
humufr@...136... wrote: