Mercurial > hg > smallbox
view util/ksvd utils/collincomb.m @ 228:198d4d9cee74 luisf_dev
Now can use a local configuration file, which is a copy of the default config files, and thus not being commited to the repository.
author | luisf <luis.figueira@eecs.qmul.ac.uk> |
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date | Thu, 12 Apr 2012 15:06:41 +0100 |
parents | c3eca463202d |
children |
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%COLLINCOMB Linear combination of matrix columns. % Y = COLLINCOMB(A,COLS,X) computes a linear combination of the columns of % the matrix A. The column indices are specified in the vector COLS, and % the correspoinding coefficients are specified in the vector X. The % vectors COLS and X must be of the same length. % % The call Y = COLLINCOMB(A,COLS,X) is essentially equivalent to % % Y = A(:,COLS)*X . % % However, it is implemented much more efficiently. % % Y = COLLINCOMB(A,ROWS,COLS,X) only works on the rows of A specified % in ROWS, returning a vector of length equal to ROWS. This call is % essentially equivalent to the command % % Y = A(ROWS,COLS)*X . % % See also ROWLINCOMB. % Ron Rubinstein % Computer Science Department % Technion, Haifa 32000 Israel % ronrubin@cs % % April 2009