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matrix operation [message #74103]

Thu, 23 December 2010 06:39

Gray
Messages: 253
Registered: February 2010

Senior Member

Hi all,

I'm just getting really confused about how to do this properly. Can
you all help?

I have a list of x y coordinates, and I want to perform an affine
transformation on them, so I have a 3xN array of (xi,yi,1) and a 3x3
matrix for my transformation, and I want to end up with a 3xN array of
(x'i,y'i,1). How can I transform all my coordinates at once? I know
my tools are #, ##, transpose/reform, and matrix_multiply, but I seem
to be chronically unable to sort this out. Thanks!

--Gray

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