我正在编写一些函数来插入数据。在使用 interp2D 时，以某种方式，示例矩阵可以工作，但是当我更改矩阵的大小时，它会返回错误。

#!/usr/bin/python3

# 
# Useful interpolation functions in python.
# 

import numpy as np
import scipy.interpolate

def interp_2d(x,y,fxy,x_desired,y_desired):

    interp_func = scipy.interpolate.interp2d(x, y, fxy, kind='cubic')

    return interp_func(x_desired,y_desired)

#
# Main function.
#

def main():

    x   =  np.array([0.0,1.0,2.0,3.0])
    y   =  np.array([0.0,1.0,2.0,3.0])
    fxy =  np.array([[50.0,60.0,70.0,80.0],
                     [50.0,60.0,70.0,80.0],
                     [50.0,60.0,70.0,80.0],
                     [50.0,60.0,70.0,80.0]])

    # With the current definition of x,y and fxy works.

    x_desired = 1.0
    y_desired = 1.0

    print(interp_2d(x,y,fxy,x_desired,y_desired)[0]) # returns 60.0, ok !

    # With this definition, it crashes.

    x   =  np.array([0.0,1.0])
    y   =  np.array([0.0,1.0])
    fxy =  np.array([[50.0,60.0],[50.0,60.0]])

    x_desired = 1.0
    y_desired = 1.0

    print(interp_2d(x,y,fxy,x_desired,y_desired)[0]) # Crashes, should be 60 as well.


if __name__== "__main__":
    main()

它仍然是一个方阵，但是，它不能正确处理问题。

The error it returns is:
Traceback (most recent call last):
  File "./interp_ask.py", line 49, in <module>
    main()
  File "./interp_ask.py", line 45, in main
    print(interp_2d(x,y,fxy,x_desired,y_desired)[0]) # Crashes
  File "./interp_ask.py", line 12, in interp_2d
    interp_func = scipy.interpolate.interp2d(x, y, fxy, kind='cubic')
  File "/usr/lib/python3.7/site-packages/scipy/interpolate/interpolate.py", line 249, in __init__
    kx=kx, ky=ky, s=0.0)
dfitpack.error: (mx>kx) failed for hidden mx: regrid_smth:mx=2

谢谢你们 ！