MATLAB: Hi, I have a question about this function :

MATLABmatrix manipulation

Hi, I have a question about this function : function y = mean(x,dim) %MEAN Average or mean value. % For vectors, MEAN(X) is the mean value of the elements in X. For % matrices, MEAN(X) is a row vector containing the mean value of % each column. For N-D arrays, MEAN(X) is the mean value of the % elements along the first non-singleton dimension of X. % % MEAN(X,DIM) takes the mean along the dimension DIM of X. % % Example: If X = [0 1 2 % 3 4 5] % % then mean(X,1) is [1.5 2.5 3.5] and mean(X,2) is [1 % 4] % % Class support for input X: % float: double, single % % See also MEDIAN, STD, MIN, MAX, VAR, COV, MODE.
% Copyright 1984-2005 The MathWorks, Inc. % $Revision: 5.17.4.3 $ $Date: 2005/05/31 16:30:46 $
if nargin==1,
% Determine which dimension SUM will use
dim = min(find(size(x)~=1));
if isempty(dim), dim = 1; end
y = sum(x)/size(x,dim);
else
y = sum(x,dim)/size(x,dim);
end
* The question is : What is the meaninig of the line code : dim = min(find(size(x)~=1)); Thank's

Best Answer

"dim" is the first array dimension of the multidimensional array x whose size does not equal 1.
Best wishes
Torsten.
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