Matplotlib imshow: Data rotated?

Question

I was trying to plot some data with scatter. My code is

import matplotlib.pyplot as plt
import matplotlib as mpl
import numpy as np
from scipy.interpolate import         


        

Answer 1

Consider to use pcolormesh or contourf if you want to plot data of the form f(X, Y) = Z. imshow simply plots data Z, scaling and resampling has do be done manually.