Replace elements of each matrix within a cell array

I have a cell array with matrices in each cell and I want to edit the same elements in each matrix. How do I do this?

The code below shows how it can be created using a for loop but I want to vectorise it if possible where nD is a constant and nn is a vector and changes for each cell

 G=zeros(4,nD*nn);
 G([1 3],1:nD:end)=1;
 G([4 2],2:nD:end)=1;

[the cyclist]

Your example is confusing to me, because it shows neither a cell array nor a for loop.

Can you give a small but representative example of the input and output you are expecting? It might also be helpful to upload your cell array here, in a MAT file. You can use the paper clip icon in the INSERT section of the toolbar.

Answer 1

[Bhavana Ravirala]

Hi,

I understand that you want to vectorize cell fun assignment.

You can use the ‘cellfun’ to apply a function to each element of the cell array.

nD = 10;
nn = 10;
M = cell(100,1);
for i=1:100
    M{i}=zeros(4,nD*nn);
end
disp(M{1});
M = cellfun(@(x)temp(x), M, 'UniformOutput',false);
disp(M{1});

If you were looking to improve the performance of the operation, you can use the parfor loop.

For more information, please refer the below link.

https://www.mathworks.com/help/matlab/ref/cellfun.html