python - How to get these shapes to line up for a numpy matrix -


i'm trying input vectors numpy matrix doing:

eigvec[:,i] = null

however keep getting error:

valueerror: not broadcast input array shape (20,1) shape (20)

i've tried using flatten , reshape, nothing seems work

the shapes in error message clue.

in [161]: x = np.zeros((10,10))  in [162]: x[:,1] = np.ones((1,10))  # or x[:,1] = np.ones(10)  in [163]: x[:,1] = np.ones((10,1)) ... valueerror: not broadcast input array shape (10,1) shape (10) in [166]: x[:,1].shape out[166]: (10,) in [167]: x[:,[1]].shape out[167]: (10, 1)  in [168]: x[:,[1]] = np.ones((10,1))

when shape of destination matches shape of new value, copy works. works in cases new value can 'broadcasted' fit. not try more general reshaping. note indexing scalar reduces dimension.


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