Problem 307. First non-zero element in each column
For a given matrix, calculate the index of the first non-zero element in each column. Assuming a column with all elements zero is not permitted.
Example:
in->x = [0 1 0 0;
4 3 7 0;
0 0 2 6;
0 9 0 5];
out->i = [2 1 2 3]; % row numbers
Solution Stats
Problem Comments
-
2 Comments
Ned Gulley
on 5 Apr 2012
I fixed the test. There was no assert statement.
Dyuman Joshi
on 29 Oct 2021
Test cases have been added.
Solution Comments
Show commentsProblem Recent Solvers833
Suggested Problems
-
Make the vector [1 2 3 4 5 6 7 8 9 10]
47487 Solvers
-
Find the longest sequence of 1's in a binary sequence.
5896 Solvers
-
1696 Solvers
-
Right Triangle Side Lengths (Inspired by Project Euler Problem 39)
1605 Solvers
-
Fix the last element of a cell array
1175 Solvers
More from this Author10
Problem Tags
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!