Print predict ValueError: Expected 2D array, got 1D array instead

Question

The error shows in my last two codes.

ValueError: Expected 2D array, got 1D array instead: array=[0 1].

Answer 1

The error message is self-explanatory. Your library expects the input to be a 2D matrix, with one pattern per row. So, if you are doing regression with just one input, before passing it to the regressor, do

my_data = my_data.reshape(-1, 1)

to make a 2X1 shaped matrix

On the other hand (unlikely), if you have a single vector [0, 1]

my_data = my_data.reshape(1, -1) 

to make a 1X2 matrix