Thanks for the many useful responses - I eventuallyfound by experiment that
imshow( interpolation='nearest' works *if* I write a png file.
Saving a pdf file mushed up my crisp pixel boundaries. However, saving as png,
then using (mac osx) preview to convert to pdf worked fine.
Go figure()!
I have solved this problem earlier using figimage(), but that was a lot of work
(I had to create a pixel-by-pixel array with all greyscale values set myself,
and then I was working in pixel coordinates rather than my data coordinates).
Has anyone figured out how to get imshow to stop smoothing the image? Using
imshow(… interpolation='none'…) or imshow(… interpolation=None…) raise
exceptions.
I found NonUniformImage too hard to figure out from the documentation.
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