Change the dimension of an output matrix
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I have an output matrix of (5*5*44040) dimension. I would like to convert it into 1 dimension so basically all the (5*5) are stacked up and the final matrix is 220200 row. Any ideas? Thank you guys.
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Jan
2016 年 4 月 11 日
編集済み: Jan
2016 年 4 月 17 日
I guess, that you either want a simple:
out = in(:);
Or:
out = reshape(permute(in, [2,1,3]), [], 1);
It depends on what "all the (5*5) are stacked up" exactly means.
2 件のコメント
Jan
2016 年 4 月 17 日
@Amine Ben Ayara: So please give a meaningful example. You can "stack" the 5x5 blocks row-wise or columns-wise. I've posted code for both versions. Does one of them work as you want? If not, please post an example with a shortwer 2x2x3 matrix.
Stephen23
2016 年 4 月 11 日
編集済み: Stephen23
2016 年 4 月 12 日
You can use permute and reshape:
>> inp(:,:,3) = [0,1;2,3]; % page 3
>> inp(:,:,2) = [4,5;6,7]; % page 2
>> inp(:,:,1) = [8,9;Inf,NaN] % page 1
inp(:,:,1) =
8 9
Inf NaN
inp(:,:,2) =
4 5
6 7
inp(:,:,3) =
0 1
2 3
>> out = reshape(permute(inp,[1,3,2]),[],2)
out =
8 9 % page 1
Inf NaN % page 1
4 5 % page 2
6 7 % page 2
0 1 % page 3
2 3 % page 3
2 件のコメント
Stephen23
2016 年 4 月 11 日
編集済み: Stephen23
2016 年 4 月 11 日
@Amine Ben Ayara: note that the output order is actually 1,2,3,4,..., because I presumed that you wanted your matrices arranged sequentially like this. The values [1,3,2] are just used to rearrange the array dimensions, not the output order. (notice that your array has three dimensions, and my array has three dimensions, and these are what are rearranged). In any case, you would only need to change the final reshape size, like this:
reshape(permute(inp,[1,3,2]),[],5)
^ to match the matrix size
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