How to get a random 50x14 matrix from 300x14 matrix
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Amirali AGHAMIRI
2022 年 3 月 27 日
コメント済み: Amirali AGHAMIRI
2022 年 3 月 28 日
Hello,
Could you please tell me how to get a random 50x14 matrix from 300x14 matrix?
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Image Analyst
2022 年 3 月 27 日
Perhaps this, if you want all 50 rows to be adjacent to each other and not randomly chosen.
% Define matrix.
m = randi(9, 300, 14)
% Get starting and ending rows
startingRow = randi(size(m, 1)-49, 1, 1)
endingRow = startingRow + 49
% Extract a band of 50 contiguous rows
m50 = m(startingRow : endingRow, :);
3 件のコメント
Image Analyst
2022 年 3 月 28 日
So just delete the first line where I created an m. I just did that because you keep forgetting to attach your actual matrix in a .mat file with the paperclip icon.
% Get starting and ending rows
startingRow = randi(300-49, 1, 1)
endingRow = startingRow + 49
As you can see above when I ran it, it would take all rows between 207 and 256 of your original matrix and extract them to a new matrix called m50. Why do you think that will not work for your matrix?
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