Reshaping array horizontally elementwise

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

[Shriram Krishna]

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. : )

[DGM]

Moving Martin Varghese's comment here:

To retain the same row order while translating. This is more accurate solution

[Image Analyst]

@DGM you can use the crossing arrows icon to move posts. This way it retains the original authorship.

[DGM]

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?

Answer 1

[sushma sharma]

got it!

reshape(A, 10 [])'

Answer 2

[Image Analyst]

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

[NALLARASU KRISH]

Very apt answer. Keep it up!