What's the difference?

Question

Francesco 2014-2-21

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/117173-what-s-the-difference

评论： Francesco 2014-2-21

      out1.Y=cellfun(@(c) bsxfun(@minus, c,c(100,:)), out1.Y,'uni',0);
>> out1.Y
ans = 
    Columns 1 through 4
      [1000x9 double]    [1000x9 double]    [1000x9 double]    [1000x9 double]
    Columns 5 through 8
      [1000x9 double]    [1000x9 double]    [1000x9 double]    [1000x9 double]
matrice1=bsxfun(@minus,matrice1, matrice1(100,:));   %%

where matrice1 is the 1000x9 double. What's the difference between this two lines of code? I think there is no difference. Is ir right? Is it the same thing? I would like to do the same thing but the line command is different because in the first code I work with cell array and in the second code I work with simply array.

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Answer 1

Walter Roberson 2014-2-21

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https://ww2.mathworks.cn/matlabcentral/answers/117173-what-s-the-difference#answer_125309

The first line goes through and does the task for all cell array members in out1.Y and the second one only does a single numeric array.

The @(c) is creating an anonymous function for cellfun to act on. You can see that the anonymous function's body is structurally the same as the second line, so the logic of the second one is being applied repeatedly in the first one.