For loop iteration issue

I have a binary thresholded Image that I want to loop through its matrix using a for loop.

In python, I would write the code like this:

for i in binaryImage:

...

(you get the point!)

How do I loop through the binaryImage matrix I have in MATLAB for further operations?

Answer 1

[Steven Lord]

Loop through elements?

A = magic(4);
s = 0;
for elt = 1:numel(A)
s = s + A(elt);
end
fprintf("The sum of elements in a 4-by-4 magic sum is %d.", s)

The sum of elements in a 4-by-4 magic sum is 136.

Through columns?

cs = zeros(4, 1);
for col = 1:width(A)
cs = cs + A(:, col);
end
fprintf("The sum of the columns is")

The sum of the columns is

disp(cs)

    34
    34
    34
    34

or you can just use the array as the indices.

cs2 = zeros(4, 1);
for col = A
cs2 = cs2 + col;
end
fprintf("The sum of the columns is also")

The sum of the columns is also

disp(cs2)

    34
    34
    34
    34

Through rows?

rs = zeros(1, 4);
for row = 1:height(A)
rs = rs + A(row, :);
end
fprintf("The sum of the rows is")

The sum of the rows is

disp(rs)

    34    34    34    34

Do you need to loop?

Depending on what you want to do, though, you may not need to loop.

fprintf("A has %d elements greater than 11", nnz(A > 11))

A has 5 elements greater than 11

[Bahaa Soliman]

Thank you Steven