Creating a matrix from one column

Question

Piotr 2022-9-23

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1810890-creating-a-matrix-from-one-column

评论： Piotr 2022-9-26

Hello,

I have data in one column which has a few thousand rows, from which I would like to create a matrix with the same data in each column, and with the number of columns the same as the number of rows. Later on, I would like to extract it as a csv file. I feel it could be fairly easily to be done but couldn't succeed yet. Thanks in advance for any comments

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Answer 1

Davide Masiello 2022-9-23

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1810890-creating-a-matrix-from-one-column#answer_1059465

在 MATLAB Online 中打开

A = rand(1,1000)'
A = 1000×1
3433
2117
2324
9507
6145
0998
8159
1063
1736
4148
M = repmat(A,[1 length(A)])
M = 1000×1000
3433    0.3433    0.3433    0.3433    0.3433    0.3433    0.3433    0.3433    0.3433    0.3433    0.3433    0.3433    0.3433    0.3433    0.3433    0.3433    0.3433    0.3433    0.3433    0.3433    0.3433    0.3433    0.3433    0.3433    0.3433    0.3433    0.3433    0.3433    0.3433    0.3433
2117    0.2117    0.2117    0.2117    0.2117    0.2117    0.2117    0.2117    0.2117    0.2117    0.2117    0.2117    0.2117    0.2117    0.2117    0.2117    0.2117    0.2117    0.2117    0.2117    0.2117    0.2117    0.2117    0.2117    0.2117    0.2117    0.2117    0.2117    0.2117    0.2117
2324    0.2324    0.2324    0.2324    0.2324    0.2324    0.2324    0.2324    0.2324    0.2324    0.2324    0.2324    0.2324    0.2324    0.2324    0.2324    0.2324    0.2324    0.2324    0.2324    0.2324    0.2324    0.2324    0.2324    0.2324    0.2324    0.2324    0.2324    0.2324    0.2324
9507    0.9507    0.9507    0.9507    0.9507    0.9507    0.9507    0.9507    0.9507    0.9507    0.9507    0.9507    0.9507    0.9507    0.9507    0.9507    0.9507    0.9507    0.9507    0.9507    0.9507    0.9507    0.9507    0.9507    0.9507    0.9507    0.9507    0.9507    0.9507    0.9507
6145    0.6145    0.6145    0.6145    0.6145    0.6145    0.6145    0.6145    0.6145    0.6145    0.6145    0.6145    0.6145    0.6145    0.6145    0.6145    0.6145    0.6145    0.6145    0.6145    0.6145    0.6145    0.6145    0.6145    0.6145    0.6145    0.6145    0.6145    0.6145    0.6145
0998    0.0998    0.0998    0.0998    0.0998    0.0998    0.0998    0.0998    0.0998    0.0998    0.0998    0.0998    0.0998    0.0998    0.0998    0.0998    0.0998    0.0998    0.0998    0.0998    0.0998    0.0998    0.0998    0.0998    0.0998    0.0998    0.0998    0.0998    0.0998    0.0998
8159    0.8159    0.8159    0.8159    0.8159    0.8159    0.8159    0.8159    0.8159    0.8159    0.8159    0.8159    0.8159    0.8159    0.8159    0.8159    0.8159    0.8159    0.8159    0.8159    0.8159    0.8159    0.8159    0.8159    0.8159    0.8159    0.8159    0.8159    0.8159    0.8159
1063    0.1063    0.1063    0.1063    0.1063    0.1063    0.1063    0.1063    0.1063    0.1063    0.1063    0.1063    0.1063    0.1063    0.1063    0.1063    0.1063    0.1063    0.1063    0.1063    0.1063    0.1063    0.1063    0.1063    0.1063    0.1063    0.1063    0.1063    0.1063    0.1063
1736    0.1736    0.1736    0.1736    0.1736    0.1736    0.1736    0.1736    0.1736    0.1736    0.1736    0.1736    0.1736    0.1736    0.1736    0.1736    0.1736    0.1736    0.1736    0.1736    0.1736    0.1736    0.1736    0.1736    0.1736    0.1736    0.1736    0.1736    0.1736    0.1736
4148    0.4148    0.4148    0.4148    0.4148    0.4148    0.4148    0.4148    0.4148    0.4148    0.4148    0.4148    0.4148    0.4148    0.4148    0.4148    0.4148    0.4148    0.4148    0.4148    0.4148    0.4148    0.4148    0.4148    0.4148    0.4148    0.4148    0.4148    0.4148    0.4148
writematrix(M,'yourfile.csv')