Finding an element of a cell in a cell array

Question

Sean 2014-7-1

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/139762-finding-an-element-of-a-cell-in-a-cell-array

编辑： Cedric 2014-7-1

采纳的回答： Cedric

在 MATLAB Online 中打开

If I have a cell array:

C= [ [1 2 3], [2 2 3], [5 2 7 10 2 1], [12 10 22 0] ,[4 7 5] ]

I want to locate all of the 1's ( so C{1}(1), and C{3}(6) ), and replace them with two random numbers. How might I go about doing that?

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Answer 1

Cedric 2014-7-1

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/139762-finding-an-element-of-a-cell-in-a-cell-array#answer_143238

编辑：Cedric 2014-7-1

在 MATLAB Online 中打开

A simple loop would do

 C = { [1 2 3], [2 2 3], [5 2 7 10 2 1], [12 10 22 0] ,[4 7 5] } ;
 for cId = 1 : numel( C )
     is1 = C{cId} == 1 ;
     if any( is1 )
         C{cId}(is1) = rand( 1, nnz(is1) ) ;
     end
 end

outputs C with..

 >> C{1}
 ans =
    0.6324    2.0000    3.0000
 >> C{2}
 ans =
     2     2     3
 >> C{3}
 ans =
    5.0000    2.0000    7.0000   10.0000    2.0000    0.0975