Cumulative 2x2 Complex Matrix Multiplication

This takes a 2x2xm matrix and calculates the cumulative matrix multiplication along the 3rd diim.
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Updated 25 Feb 2014

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This function calculates the cumulative matrix multiplication of input complex matrices A(2,2,m)
This function should be compiled using the Maltab Mex function.
m = 1000; % number of matrices
A = rand(2,2,m) + 1i * rand(2,2,m); % Example matrix;
B = cM(A); % B is a 2x2 matrix

This function is up to 180 times faster that the equivalent for loop.

B = eye(2);
for ii = 1 : 1000
B = B * A(:,:,ii);
end

Cite As

Nicolas Ayotte (2024). Cumulative 2x2 Complex Matrix Multiplication (https://www.mathworks.com/matlabcentral/fileexchange/45651-cumulative-2x2-complex-matrix-multiplication), MATLAB Central File Exchange. Retrieved .

MATLAB Release Compatibility
Created with R2013a
Compatible with any release
Platform Compatibility
Windows macOS Linux
Categories
Find more on Creating and Concatenating Matrices in Help Center and MATLAB Answers
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Version Published Release Notes
1.1.0.0

Update the example of function use to a correct one.

1.0.0.0