e=rms(y);

function e=rms(y);

% function e=rms(y);
%
% e is the l2-norm of row vector y, for a n-by-m matrix e is the n-by-1 column 
% vector which is the l2-norm of the n rows of y.;
%
%Michael Small
%3/3/2005
[e-mail]

if ndims(y)>2,
  
  e=sqrt(mean(y.^2));
  
else
  [a,b]=size(y);

  if b==1 
    e=abs(y);
  else
    if a==1
      y=y';
    end;
    e=sqrt(mean(y'.^2))';
  end;
end;