Multiply a cell array with a matrix in an equation

2021 7 9
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更新时间：2021 7 9
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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'.

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Matt J
Matt J 2021-7-9
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
MarshallSc 2021-7-9
编辑：MarshallSc 2021-7-9
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

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Matt J
Matt J 2021-7-9

1 个投票

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

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MarshallSc
MarshallSc 2021-7-9
编辑：MarshallSc 2021-7-9
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
Matt J 2021-7-9
eqn{i,j}=A{i,j}.*C{i,j}+(1-A{i,j}).*C{i,j};

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