From: bhargav v. <coo...@gm...> - 2011-01-31 17:58:40
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Hello I am using matplotlib 1.0.0 version. and would like to use the imshow() to display my 2D image [512 X 1024] so when I use the imshow() command as imshow(array,origin='lower',interpolation='bilinear') xlables - [0,100,200,400,500] ylabels - [0,200,400,600,800,1000] which is correct as by default the imshow will set the grid number as the labels. Now, physical size of this grid is [52 X 152] .... so to get that values, I use the following command imshow(array,origin='lower',interpolation='bilinear',extend=[0.0,52.0,0.0,152.0]) and the image that I obtain is not correct. By not correct I mean that the important features in the image are not at the positions where I expect them to be while transforming from [512 X 1024] grid to [52 X 152] physical grid. I presume this could be due to the fact that the extent just divides the axis in uniform grid ... however my grid is not uniform. But I do know the pixel width (dx and dy) at each position. I have tried to use pcolor but somehow the pcolor() is too slow for such a large grid. Can anyone help me in getting the X, and Y values correct on the axes , using imshow() and complete grid information, when I transform from [512 X 1024] grid to [52 X 152] physical grid. Cheers Bhargav Vaidya. |