Unexpected and unwanted behaviour of control.ctrb #1097
Description
I have found some unexplainable and unwanted behavior of the control.ctrb functions, which returns a 'controllability matrix' with incorrect dimensions rather than returning an error/warning that the
MWE:
import numpy as np
import control as ct
A = np.array([[1, 1], [0, 1]])
b = np.array([1, 1])
C = ct.ctrb(A, b) # Rather then 1) returning an error that b is not properly dimensioned, or 2) assuming that b is a columns vector, it instead returns a matrix with shape 2 x 4, which makes no sense for a controllability matrix
C_T = ct.ctrb(A, np.atleast_2d(b).T) # Explicitly specifying that b is a column vector fixes this and C_T is now a 2 x 2 matrix
I believe the behavior is incorrect, and it took me quite some time to understand what was going wrong; any (dis)agreement would be appreciated, thanks.