Matlab Warning: Concatenation of empty arrays
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Hi,
I have write these lines in a matlab function
[r2, c2] = find(row == -2);
[r10, c10] = find(row == -10);
[r11, c11] = find(row == -11);
[r15, c15] = find(row == -15);
c = [c2 c10 c11 c15];
When I run the function on the matlab prompt I visualize this warning on the last line of the above code
Warning: Concatenation involves an empty array with an incorrect number of rows.
How can I resolve this warning?
Thanks in advance
Andrew
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Réponses (2)
Azzi Abdelmalek
le 26 Jan 2013
Modifié(e) : Azzi Abdelmalek
le 26 Jan 2013
Because c2 and c10, for example, have not the same size, then you can't concatenate them horizontally. Use instead
c = [c2 ;c10; c11; c15];
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Walter Roberson
le 26 Jan 2013
Perhaps this would be suitable?
c = find(row == -2 | row == -10 | row == -11 | row = -15);
which could also be coded as
c = find(ismember(row, [-2, -10, -11, -15]));
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