HOW CAN CREATE A MATRIX FROM A SINGLE ROW?

Question

simone zappalà 2022-3-13

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1670559-how-can-create-a-matrix-from-a-single-row

评论： John D'Errico 2022-3-13

采纳的回答： Arif Hoq

I have 12 elements distributed on a single row, i've to put them on a 3x4 matrix, how i do that?

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Answer 1

Arif Hoq 2022-3-13

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https://ww2.mathworks.cn/matlabcentral/answers/1670559-how-can-create-a-matrix-from-a-single-row#answer_916379

在 MATLAB Online 中打开

use reshape function.

A=randi(100,1,12)
A = 1×12
    99    27    87    54    85    99    10    14    94     9    80    42
output=reshape(A,3,4)
output = 3×4
    99    54    10     9
    27    85    14    80
    87    99    94    42

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John D'Errico 2022-3-13

在 MATLAB Online 中打开

With only the caveat that the solution offerd by @Arif Hoq puts the elements into the matrix going down the columns. If @simone zappalà wanted to put the elements going across rows from the original vector, then this subtle change would do the trick:

A = [99    27    87    54    85    99    10    14    94     9    80    42];
output=reshape(A,4,3).'
output = 3×4
    99    27    87    54
    85    99    10    14
    94     9    80    42

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