[SciPy-user] dot product of vectors stored as "matrix"?
David Warde-Farley
david.warde.farley@utoronto...
Fri Mar 2 10:41:54 CST 2007
This is more a question of elegance than anything else, but, given
2 column vectors (or row vectors) stored as type "matrix", why
doesn't dot(x,y) give you their dot product? I get complaints about
"matrices not aligned".
Of course dot(x.T, y) works (with the annoying caveat that you get a
matrix and have to dereference its single element), and so does dot
(x.A.squeeze(), y.A.squeeze()), and so too does sum(multiply(x,y)).
Is there a preferred notation for linear-algebra dot products, one
that's faster than the others?
David
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