- 1st row, 2nd column, value 34?
- 12th row, 3rd column, value 4?
- 1st row, 23rd column, value 4?
How to write matrix elements with its position?
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I have a matrix A=[1 2 3; 4 5 6; 7 8 9] I want to write each entry with its row and column position e.g 111 indicates the element 1 at position first row First column , also 328 element 8 at position 3rd row and second column. so with the help of above matrix
A I want the following
111
122
133
214
225
236
317
328
339
Thanking for the anticipation.
1 commentaire
Guillaume
le 25 Jan 2018
While it's very easy to do what you want, what is its purpose? Bearing in mind that if you don't limit A to integers [0-9] and its size to a max of 9 rows and 9 columns, then the operation is irreversible.
What would the value 1234 mean?
Réponse acceptée
Birdman
le 25 Jan 2018
Modifié(e) : Birdman
le 25 Jan 2018
[r,c]=find(A);
val=sortrows([r c A(:)],1)
2 commentaires
Guillaume
le 25 Jan 2018
That will fail if any value in A is 0.
[r, c] = find(true(size(A));
val = sortrows([r c A(:)],1)
would be safer.
Or:
[c, r] = ndgrid(1:size(A, 2), 1:size(A, 1));
val = [r(:), c(:), a(:)];
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