function [y] = ste(x,varargin)

% function [y] = ste(x,varargin) % % matlab doesn’t have a standard error function, but it’s easy % enough to calculate. ste(x) = std(x)/sqrt(n) where n is the % number of samples % % this is just a wrapper function that calls std, and then divides % by sqrt(size(x,1)) % % the only functionality i’ve added is that you can stipulate to % calculate the std on the 2nd dimension (i.e. the columns), just % as you can with mean(x,2) or size(x,2). however, you can’t tell % the std to normalise differently - i’ve left it at the default % behaviour. let me know if this seems wrong to you - cheers, Greg

if nargin==2 if varargin{1}==2 x = x’; end end

n = size(x,1); y = std(x) / sqrt(n);

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Email me - updated 31 Dec 2012