matrixfunction

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28 Feb 2009 (Updated )

summary

matrixfunccn(hFunction,A,B)
function Y = matrixfunccn(hFunction,A,B)
% matrixfunccn
%   Y = matrixfunccn(hFunction,A,B)
%
%   Invokes hFunction on the columns of matrices A and B. 
%   hFunction is a function handle that accepts two vectors.
%   hFunction is invoked aCols*(2*bCols-aCols+1)/2 times.
%   Y is a cell matrix of size([aCols bCols]). 
%
%   Example
%       A = [1 2 3; 4 5 6; 7 8 9]
%       Y = matrixfunccn(@dot,A,A);         % Simple example, same as A'*A
%       Y = [66]    [ 78]    [ 90]
%             []    [ 93]    [108]
%             []       []    [126]
%
%   See also
%       matrixfun matrixfunrr matrixfunrc matrixfuncc matrixfuncr matrixfunt
%       matrixfunn matrixfunrrn matrixfunrcn matrixfunccn matrixfuncrn matrixfuntn
%       matrixfuni matrixfunir matrixfunic
%

%% Author Information
%   Pierce Brady
%   Smart Systems Integration Group
%	Cork Institute of Technology
% 

%%
nA = size(A,2);                             % Matrix size
nB = size(B,2);                             % Matrix size
Y = cell([nA nB]);                          % Prefine loop variable
for i = 1:nA                              	% Loop through each column
    for j = i:nB                            % Loop through each column
        Y{i,j} = hFunction(A(:,i),B(:,j));  % Invoke function
    end
end
end

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