Reshaping array horizontally elementwise
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Hi,
I have a 1 x 100 array, A. How can I reshape it so that I have a 10 x 10 double so that the first ten elements are the first row, second ten element are the second row, etc.
I tried reshape(A, [10,10]) but that arranged them down columns instead of rows. Any help would be appreciated!
Sushma
4 个评论
Shriram Krishna
2020-8-28
Hello,
I know I'm 4 years late but i'll give my thoguhts for anyone who might want it for the future.
if your array us A = [1 2 3 4 5 6 ] and you want it to such that [1 2 3] is row 1 and [4 5 6] is row 2 then reshape(A,2,3) gives [1 3 5] as row 1 and [2 4 6]. The simple fix for this is to do reshape(A,3,2) and then take the transpose. Hope this helps. : )
Image Analyst
2022-11-9
@DGM you can use the crossing arrows icon to move posts. This way it retains the original authorship.
DGM
2022-11-9
I should have mentioned that it was a comment-as-flag, not a normal answer or comment. As I mentioned in the thread on the new feature, I wish it would apply to flags as well. For some reason, I couldn't get it to @user his name either. Maybe because he has no other activity?
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Image Analyst
2016-9-28
编辑：Image Analyst
2020-8-28
Try optionally transposing the array first before and after reshaping and see what you get. Try several different ways - it's the best way to learn.
M = 1:100 % Row vector.
M1 = reshape(M, 10, [])
M2 = reshape(M, 10, [])'
M3 = reshape(M', 10, [])
M4 = reshape(M', 10, [])'
M1 =
1 11 21 31 41 51 61 71 81 91
2 12 22 32 42 52 62 72 82 92
3 13 23 33 43 53 63 73 83 93
4 14 24 34 44 54 64 74 84 94
5 15 25 35 45 55 65 75 85 95
6 16 26 36 46 56 66 76 86 96
7 17 27 37 47 57 67 77 87 97
8 18 28 38 48 58 68 78 88 98
9 19 29 39 49 59 69 79 89 99
10 20 30 40 50 60 70 80 90 100
M2 =
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
61 62 63 64 65 66 67 68 69 70
71 72 73 74 75 76 77 78 79 80
81 82 83 84 85 86 87 88 89 90
91 92 93 94 95 96 97 98 99 100
M3 =
1 11 21 31 41 51 61 71 81 91
2 12 22 32 42 52 62 72 82 92
3 13 23 33 43 53 63 73 83 93
4 14 24 34 44 54 64 74 84 94
5 15 25 35 45 55 65 75 85 95
6 16 26 36 46 56 66 76 86 96
7 17 27 37 47 57 67 77 87 97
8 18 28 38 48 58 68 78 88 98
9 19 29 39 49 59 69 79 89 99
10 20 30 40 50 60 70 80 90 100
M4 =
1 2 3 4 5 6 7 8 9 10
11 12 13 14 15 16 17 18 19 20
21 22 23 24 25 26 27 28 29 30
31 32 33 34 35 36 37 38 39 40
41 42 43 44 45 46 47 48 49 50
51 52 53 54 55 56 57 58 59 60
61 62 63 64 65 66 67 68 69 70
71 72 73 74 75 76 77 78 79 80
81 82 83 84 85 86 87 88 89 90
91 92 93 94 95 96 97 98 99 100
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