Hi, the documentation for dot says that a value error is raised if:
If the last dimension of a is not the same size as the
second-to-last dimension of b.
(http://docs.scipy.org/doc/numpy/reference/generated/numpy.dot.htm)
This doesn't appear to be the case:
>>> a = array([[1,2],[3,4]])
>>> b = array([1,2])
>>> dot(a,b)
array([5,11])
I can see *how* 5,11 is obtained, but it seems this should have raised
a ValueError since the 2 != 1. So the actual code must do something
more involved. When I think about broadcasting, it seems that maybe b
should have been broadcasted to:
--> array([[1,2],[1,2]])
and then the multiplication done as normal (but this would give a 2x2 result).
Can someone explain this to me?
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