Summing all the Matrices in a Cell Array?
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hithere
el 5 de Nov. de 2014
Lets say i have a cell array with 3 7x2 matrices in it:
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![](https://www.mathworks.com/matlabcentral/answers/uploaded_files/145979/image.jpeg)
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How do i sum them up so to get a single 7x2 matrix?
In this exmaple, i only have 3 matrices.
But i may have a cell array with maybe 100+ matrices.
How should i do it?
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Matt J
el 5 de Nov. de 2014
Editada: Matt J
el 5 de Nov. de 2014
You probably should not be in this situation to begin with. Whatever code you're using to create the cell array, should probably be organizing the data as a 7x2xP numeric array instead. Most operations on an MxNxP array will be more efficient than with the MxN slices split across P cells.
An exception to this is when M*N is large and you're trying to avoid the copies that MATLAB makes when you do things like
a=A(:,:,i)
but the slices would have to be very very large to warrant that.
Respuesta aceptada
Azzi Abdelmalek
el 5 de Nov. de 2014
Editada: Azzi Abdelmalek
el 5 de Nov. de 2014
a={rand(7,2) rand(7,2) rand(7,2)} % This is an example
b=sum(cat(3,a{:}),3)
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