Python - plotting 2D array but need the indices to correspond to coordinates. How do I do this?

Question

I have an array of 2D data that I'd like to plot using imshow(). Since my data is in a 2D array, it's indexed as 0-300 x 0-300. However, the real data translates to physical X,Y coordinates. So, the value at arr[0,0] would actually correspond to the value at X,Y coordinate (-3,-3). I'm not sure how to properly plot that so that the axes of my plot range from (-3 to 3) as opposed to (0 to 300).

I'm using matplotlib and Python.

Use the `extent` keyword of `imshow`. Also check existing questions on that topic. — ImportanceOfBeingErnest, Feb 19 '20 at 22:23

score 0 · Answer 1 · answered Feb 19 '20 at 22:33

0

imshow comes with extent which solves your problem, you can read about how to use it here.

answered Feb 19 '20 at 22:33

kebab-case

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Python - plotting 2D array but need the indices to correspond to coordinates. How do I do this?

1 Answers1