function stdOut = standardize(in);
%standardize Standardize each column of a matrix.
%
% Standardize each column of an input matrix by subtracting
% the column mean and dividing by the standard deviation of 
% the column.
%
% USE:
% out = standardize(in)
%

% Tomo Eguchi
% 24 January 2002

%in = [normrnd(3,1,10,1), normrnd(5,4,10,1), normrnd(2,6,10,1)];

meanVec = mean(in);
stdVec = std(in);

[nr, nc] = size(in);
stdOut = (in - repmat(meanVec, nr, 1))./(repmat(stdVec, nr, 1));