Subtract matrices in an array 'A' with elements from matrix 'B'

2021 3 11
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更新时间：2021 3 11
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I have a 1x27 cell array 'A' containing 27 [56x2] doubles. I also have a 27x2 matrix 'B'. I want to subtract all the elements from A{1} with B(1,:) and A{2} with B(2,:) and so on. How do I write a for loop for this?

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Leeba Chacko
Leeba Chacko 2021-3-11

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Thank you for the answers. I managed to solve this using the following code.
[m n]=size(B);
for i=1:length(A)
for j=1:m
D{i}(j,:)= A{i}(j,:) - B(i,:);
end
end

更多回答（2 个）

KSSV
KSSV 2021-3-11

0 个投票

iwant = cell(size(A));
for i = 1:length(A)
iwant{i} = A{i}-B(i,:) ;
end
Walter Roberson
Walter Roberson 2021-3-11
Ran in:

0 个投票

Ran in:
%generate A and B for demo
A = arrayfun(@(idx) rand(56,2), 1:27, 'uniform', 0)
A = 1x27 cell array
{56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double}
B = rand(27,2)
B = 27×2
0.5867 0.3973 0.6645 0.7897 0.1848 0.7124 0.1926 0.5554 0.5047 0.3560 0.6562 0.5289 0.7456 0.6495 0.1655 0.6155 0.0578 0.6535 0.4604 0.5884
%now for the work
C = cellfun(@(a,b) a-b, A, num2cell(B, 2).', 'uniform', 0)
C = 1x27 cell array
{56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double} {56×2 double}

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