Multiply two cell arrays

Question

lucksBi 2018-2-28

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/385353-multiply-two-cell-arrays

评论： Stephen23 2018-2-28

采纳的回答： Birdman

在 MATLAB Online 中打开

Hi i have following two cell arrays mul1 and mul2.

I want to multiply each cell of mul1 with corresponding cell of mul2. I am using following code

   for i=8
     for j=7
        mul3{i,j}= mul1{i,j}.*mul2{i,j};
   end
  end

but it gives error:

    Error using  .* 
    Matrix dimensions must agree.

i also tried without using loop but still same issue.

Please help

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lucksBi 2018-2-28

在 MATLAB Online 中打开

yes you are right. It multiplies values within cells which are numeric values. Size of mul1 is 8x7 cell and mul2 is 8x7 cell.

Result of size is:

   for i=1:8
   for j=1:7
       a= size(mul1{i,j})
       b= size(mul2{i,j})
       mul3{i,j}= mul1{i,j}.*mul2{i,j};
   end
end
  Result:
     a = 1    0
     b = 0    0

Stephen23 2018-2-28

lucksBi: I did not ask you for the size of mul1 or mul2. Please read my comment again.

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Answer 1

Birdman 2018-2-28

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/385353-multiply-two-cell-arrays#answer_307558

在 MATLAB Online 中打开

Try this:

res=cellfun(@times,mul1,mul2,'uni',0)

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Andrei Bobrov 2018-2-28

编辑：Andrei Bobrov 2018-2-28

在 MATLAB Online 中打开

@lucksBi: All right!

>> mul1
mul1 =
  8×7 cell array
    [1×0 double]    [   -0.1140]    [   -0.2700]    [1×2 double]    [1×2 double]              []              []
    [1×0 double]    [1×0 double]    [1×3 double]    [    0.1967]    [1×0 double]    [1×2 double]    [1×4 double]
    [   -0.1140]    [1×0 double]    [1×0 double]    [1×3 double]    [1×2 double]    [1×0 double]    [1×3 double]
    [   -0.2700]    [1×3 double]    [1×0 double]    [1×0 double]    [    0.2598]    [   -0.8066]    [1×3 double]
    [1×2 double]    [    0.1967]    [1×3 double]    [1×0 double]    [1×2 double]    [   -0.0151]    [1×4 double]
    [1×2 double]    [1×0 double]    [1×2 double]    [    0.2598]    [1×2 double]    [1×0 double]    [1×2 double]
    [1×0 double]    [1×2 double]    [1×0 double]    [   -0.8066]    [   -0.0151]    [1×0 double]    [1×2 double]
    [   -0.0974]    [1×4 double]    [1×3 double]    [1×3 double]    [1×4 double]    [1×2 double]    [1×2 double]
>> mul2
mul2 =
  8×7 cell array
              []    [         1]    [         1]    [1×2 double]    [1×2 double]              []              []
              []              []    [1×3 double]    [         1]              []    [1×2 double]    [1×4 double]
    [         1]              []              []    [1×3 double]    [1×2 double]              []    [1×3 double]
    [         1]    [1×3 double]              []              []    [         1]    [         1]    [1×3 double]
    [1×2 double]    [         1]    [1×3 double]              []    [1×2 double]    [         1]    [1×4 double]
    [1×2 double]              []    [1×2 double]    [         1]    [1×2 double]              []    [1×2 double]
              []    [1×2 double]              []    [         1]    [         1]              []    [1×2 double]
    [         1]    [1×4 double]    [1×3 double]    [1×3 double]    [1×4 double]    [1×2 double]    [1×2 double]
>> cellfun(@times,mul1,mul2,'un',0)
ans =
  8×7 cell array
              []    [   -0.1140]    [   -0.2700]    [1×2 double]    [1×2 double]              []              []
              []              []    [1×3 double]    [    0.1967]              []    [1×2 double]    [1×4 double]
    [   -0.1140]              []              []    [1×3 double]    [1×2 double]              []    [1×3 double]
    [   -0.2700]    [1×3 double]              []              []    [    0.2598]    [   -0.8066]    [1×3 double]
    [1×2 double]    [    0.1967]    [1×3 double]              []    [1×2 double]    [   -0.0151]    [1×4 double]
    [1×2 double]              []    [1×2 double]    [    0.2598]    [1×2 double]              []    [1×2 double]
              []    [1×2 double]              []    [   -0.8066]    [   -0.0151]              []    [1×2 double]
    [   -0.0974]    [1×4 double]    [1×3 double]    [1×3 double]    [1×4 double]    [1×2 double]    [1×2 double]
>>