[Python] ValueError: A 2-dimensional array must be passed.

问题遇到的现象和发生背景

必须输入二维数组，但是我的fre是二维的 60*176的

问题相关代码，请勿粘贴截图

from pykrige.ok import OrdinaryKriging
x = [0,20,40,60]
y = [0,5,15,22]
krige = OrdinaryKriging(x,y,fre,variogram_model="linear",verbose=False,enable_plotting=False)
x_grid = np.arange(0.0, 60.0, 1.0)
y_grid = np.arange(0.0, 22.0, 0.125)
fre_grid,ss = krige.execute("grid", x_grid, y_grid)

运行结果及报错内容

ValueError: A 2-dimensional array must be passed.