Setting an element of an array to zero based on the values of a vector

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L'O.G. 2022-4-20

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https://ww2.mathworks.cn/matlabcentral/answers/1701065-setting-an-element-of-an-array-to-zero-based-on-the-values-of-a-vector

编辑： Matt J 2022-4-20

Given a 2D array with elements a(i,j), if either i or j matches any element in another vector, how do you set the value for that a(i,j) = 0?

So, for example, given A = magic(5), how do you set to 0 any element of A given a vector B = [1 2 5 8] if 1, 2, 5, or 8 is an entry in A?

Here, I want to obtain:

A =
  24     0     0    15
   0     7    14    16
   6    13    20    22
  12    19    21     3
  18    25     0     9

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采纳的回答

Matt J 2022-4-20

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1701065-setting-an-element-of-an-array-to-zero-based-on-the-values-of-a-vector#answer_946925

在 MATLAB Online 中打开

A(B,B)=0;

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L'O.G. 2022-4-20

I suppose I didn't put it well. I meant in this case, A(1,1) = 17, but 17 is not in B and therefore A(1,1) should be left as it is.

Matt J 2022-4-20

编辑：Matt J 2022-4-20

在 MATLAB Online 中打开

A = magic(5),
A = 5×5
    17    24     1     8    15
    23     5     7    14    16
     4     6    13    20    22
    10    12    19    21     3
    11    18    25     2     9
B = [1 2 5 8]; 
A( ismember(A,B) )=0
A = 5×5
    17    24     0     0    15
    23     0     7    14    16
     4     6    13    20    22
    10    12    19    21     3
    11    18    25     0     9