How to find all rows and columns that contain a specific value in MATLAB

Hello

I have a 1000 x 1000 table consisting of 1s and 0s. I want to find every row and column that consists of at least one 1 and return the indexes of them all in an array (e.g. [1 5 7 62 299 430 827]). How do I go about doing this?

Thank you

[Lianne Abrahams]

Using for loops, but I don't know exactly how. I have a similar problem; I wish to sum all elements for which the row index is equal to or greater than the column index.

Idk how to specify indexing on a conditional basis, up to now we have only been shown how give absolute index values like X(1,2)

Answer 1

[Star Strider]

Try this:

A = randi([0 1], 10, 5);                                % Create Array 'A'
A([4 8],:) = zeros(2,5);                                % Set Rows #4 & #8 Arbitrarily To All 0
B = find(any(A,2));