Multiply a cell array with a matrix in an equation

Hello, I have a cell array like below (let's call it C).

C:

And a 4*4 matrix for example:

A=rand(4,4);

I want to multiply these arguments (multiply the first component of A (A(1,1)) to all the values in the first component of C(C{1})) in an equation such that:

eqn=A*C + (1-A)*C

How can I do this?

I tried for loop but didn't work. I also tried to just use element wise multiplication but didn't work either, I get the error below:

Operator '.*' is not supported for operands of type 'cell'.

[Matt J]

I tried for loop but didn't work

Since you haven't shown us the code you tried, we cannot tell you why it didn't work.

[MarshallSc]

It's basically writing the equation above:

for i=1:4
    for j=1:4
      eqn{i,j}=A(i,j).*C{i,j}+(1-A(i,j)).*C{i,j};
    end
end

Answer 1

[Matt J]

Your code gives me no errors, but make sure you pre-allocate an empty cell array for eqn:

eqn=cell(4);
for i=1:4
    for j=1:4
      eqn{i,j}=A(i,j)*C{i,j}+(1-A(i,j))*C{i,j};
    end
end

[MarshallSc]

Just for my own information, what if instead of a matrix, “A” was a cell array with the same size, how would the multiplication be performed? I know it can be converted by using cell2mat.

[Matt J]

eqn{i,j}=A{i,j}.*C{i,j}+(1-A{i,j}).*C{i,j};

[MarshallSc]

Thank you!