Can someone help with my syntax error
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Brendan Clark
on 4 Apr 2021
Commented: Brendan Clark
on 4 Apr 2021
I'm having trouble getting this to iterate through all rows of my matrix.
the goal is simply to be able to input a random matrix, and use 2 for loops to have the program locate and fprint the row and column index for all occurences of the integer. I can't use the find function, yes this is homework.
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Walter Roberson
on 4 Apr 2021
As a guideline... beyond approximately five short lines, people are not going to be willing to type in code to test with. And even with short lines, if the question has to do with syntax errors, it is best to post the exact code as there could be hidden characters or something subtle that is important.
Accepted Answer
Image Analyst
on 4 Apr 2021
We can't run or fix an image. But this will be useful to you instead of x and y
[rows, columns] = size(a)
for col = 1 : columns
for row = 1 : rows
if a(row, col) == 5
fprintf('a = %f at row=%d and column = %d.\n', a(row, col), row, col);
end
end
end
Or vectorized, using the find() function, which you're not allowed to use for this homework problem:
matchingMap = a == 5;
[matchingRows, matchingColumns] = find(matchingMap)
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More Answers (3)
KSSV
on 4 Apr 2021
If A is your array to count number of times a number n (say 5) appears, follow:
tol = 10^-5 ;
idx = abs(A-n)<=tol ;
nnz(idx(:))
Walter Roberson
on 4 Apr 2021
for b = 1 : numel(a)
Caution: length() is not the same as width() . If the array has more rows than columns, then the length() would be the number of rows, same as height()
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