idamnjanovic@1: function y = normcols(x)
idamnjanovic@1: %NORMCOLS Normalize matrix columns.
idamnjanovic@1: %  Y = NORMCOLS(X) normalizes the columns of X to unit length, returning
idamnjanovic@1: %  the result as Y.
idamnjanovic@1: %
idamnjanovic@1: %  See also ADDTOCOLS.
idamnjanovic@1: 
idamnjanovic@1: 
idamnjanovic@1: %  Ron Rubinstein
idamnjanovic@1: %  Computer Science Department
idamnjanovic@1: %  Technion, Haifa 32000 Israel
idamnjanovic@1: %  ronrubin@cs
idamnjanovic@1: %
idamnjanovic@1: %  April 2009
idamnjanovic@1: 
idamnjanovic@1: 
idamnjanovic@1: y = x*spdiag(1./sqrt(sum(x.*x)));