How to make a grid equidistance grid from a dataframe-CodePudding

I have a matrix of dataframe 128x128 and I want to make it equidistance for interpolation how can I do it? Here is the grid from that data frame and now there are points that are not the same distance.How can I make this uniformly spaced.

CodePudding user response：

Do you want something like this? You can change the number of points as you want, just change a.

import numpy as np
import matplotlib.pyplot as plt

a = np.linspace(0,3,4)
grid = np.dstack(np.meshgrid(a,a))

plt.scatter(grid[:,:,0],grid[:,:,1])
plt.show()