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

Look at the keyword arguments of imshow. There is origin. The default is "upper", but you want "lower".

The default makes sense for plotting images, that usually start at the top-left corner. For most matrix-plotting, you'll want origin="lower"