First non-zero element in each column - MATLAB Cody - MATLAB Central

Problem 307. First non-zero element in each column

Difficulty:
(310)
Rate
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
Solve

Solution Stats

42.57% Correct | 57.43% Incorrect
Last Solution submitted on May 07, 2025

Problem Comments

Solution Comments

Show comments
LLMs with MATLAB updated to support the latest OpenAI Models
Large Languge model with MATLAB, a free add-on that lets you access...
Toshiaki Takeuchi in Generative AI
2
3
View Post

Problem Recent Solvers886

Suggested Problems

More from this Author10

Problem Tags

matrix poor_test_suite

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Start Hunting!
Go to top of page