how to assign numbers to each row of a matrix? knowing that my matrix is 70x4 so that each row has an index from 1 to 70. Thank's

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RT Student 2021-6-21

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/861375-how-to-assign-numbers-to-each-row-of-a-matrix-knowing-that-my-matrix-is-70x4-so-that-each-row-has-a

编辑： Scott MacKenzie 2021-6-21

antennaSubset =
   2     3     4
   2     3     5
   2     3     6
   2     3     7
   2     3     8
   2     4     5
   2     4     6
   2     4     7
   2     4     8
   2     5     6
   2     5     7
   2     5     8
   2     6     7
   2     6     8
   2     7     8
   3     4     5
   3     4     6
   3     4     7
   3     4     8
   3     5     6
   3     5     7
   3     5     8
   3     6     7
   3     6     8
   3     7     8
   4     5     6
   4     5     7
   4     5     8
   4     6     7
   4     6     8
   4     7     8
   5     6     7
   5     6     8
   5     7     8
   6     7     8
   3     4     5
   3     4     6
   3     4     7
   3     4     8
   3     5     6
   3     5     7
   3     5     8
   3     6     7
   3     6     8
   3     7     8
   4     5     6
   4     5     7
   4     5     8
   4     6     7
   4     6     8
   4     7     8
   5     6     7
   5     6     8
   5     7     8
   6     7     8
   4     5     6
   4     5     7
   4     5     8
   4     6     7
   4     6     8
   4     7     8
   5     6     7
   5     6     8
   5     7     8
   6     7     8
   5     6     7
   5     6     8
   5     7     8
   6     7     8
   6     7     8

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采纳的回答

Steven Lord 2021-6-21

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/861375-how-to-assign-numbers-to-each-row-of-a-matrix-knowing-that-my-matrix-is-70x4-so-that-each-row-has-a#answer_729775

在 MATLAB Online 中打开

You already have, by storing your data in a matrix.

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
% Data associated with the number 3
A(3, :)
ans = 1×5
     4     6    13    20    22

If you have different requirements for your numbering that the row indices do not satisfy, please state those requirements.

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Scott MacKenzie 2021-6-21

编辑：Scott MacKenzie 2021-6-21

在 MATLAB Online 中打开

Yes, this is doable. To show the entire matrix with the line number (row index) shown first on each line:

>> n = 5;
>> A = magic(n);
>> [(1:n)' A]
ans =
     1    17    24     1     8    15
     2    23     5     7    14    16
     3     4     6    13    20    22
     4    10    12    19    21     3
     5    11    18    25     2     9