For a row vector:

 V=[7 1 2 -3]

there is one sign change (from 2 to -3). So, the function you write must return N=1.

For this row vector:

 V=[5 9 -2 7];

there are two sign changes, one from 9 to -2 and a second from -2 to 7, thus N=2.

Similarly

 V=[-4 -6 -7 -5 -6] and V=[3 7 6 5 6 7 8 7 6]

have no sign changes (N=0).

Solve

Solution Stats

2041 Solutions

975 Solvers

Last Solution submitted on Aug 22, 2026

Last 200 Solutions

Problem Comments

Solution Comments

Show comments

Problem Recent Solvers975

Samanthe Shindel Maryam Alhabib Zied Iason

Suggested Problems

Problem Tags

Community Treasure Hunt

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

Start Hunting!