Problem 2990. Replace every 3rd element in a vector with 4

Yaz Majeed

267 solvers

2 likes

Solve

Solve Later

x is a vector of undetermined length

You are to replace every 3rd element with the number 4, example:

x = [11 23 34 43 2 31 6 34 5 45 26 7 78];

output = [11 23 4 43 2 4 6 34 4 45 26 4 78];

Make sure the code accounts for varying vector lengths

Solve

Solution Stats

441 Solutions

267 Solvers

Last Solution submitted on Apr 23, 2026

Last 200 Solutions

Problem Comments

1 Comment

Guillaume on 10 Feb 2015

In view of the recent spate of trivial problems with no test suite to speak of, thanks for making the effort of providing a proper test suite and a slightly less trivial problem.

Solution Comments

Show comments

Problem Recent Solvers267

Problem Tags

Community Treasure Hunt

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

Start Hunting!