python - Is this a Numpy Bug? Numpy ValueError: Object is not aligned -


this question has answer here:

i tried following commands:

>>> = np.matrix([[1,2],[3,4]])  >>>  matrix([[1, 2],         [3, 4]])  >>> b = np.matrix([[0,1],[0,1]])  >>> b  matrix([[0, 1],         [0, 1]])  >>> np.dot(a,b)  matrix([[0, 3],         [0, 7]])

so far, fine. after made following changes, error:

>>> tmp1 = a[np.ix_([1,1,0])]  >>> tmp2 = b[np.ix_([1,1,0])]  >>> tmp1.shape  (3, 2)  >>> tmp2.shape  (3, 2)  >>> np.dot(tmp1,tmp2)  traceback (most recent call last):   file "<stdin>", line 1, in <module> valueerror: objects not aligned

please me on i've ignored when doing above operations. want dot product of tmp1 .* tmp2 expect matlab:

matrix([[0, 4], [0, 4],[0, 2]])

thanks.

the dot product of 2 matrices of size (3,2) not valid. try transposing 1 of them


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