view util/ksvd utils/normcols.m @ 170:68fb71aa5339 danieleb

Added dictionary decorrelation functions and test script for Letters paper.
author Daniele Barchiesi <daniele.barchiesi@eecs.qmul.ac.uk>
date Thu, 06 Oct 2011 14:33:41 +0100
parents c3eca463202d
children
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function y = normcols(x)
%NORMCOLS Normalize matrix columns.
%  Y = NORMCOLS(X) normalizes the columns of X to unit length, returning
%  the result as Y.
%
%  See also ADDTOCOLS.


%  Ron Rubinstein
%  Computer Science Department
%  Technion, Haifa 32000 Israel
%  ronrubin@cs
%
%  April 2009


y = x*spdiag(1./sqrt(sum(x.*x)));