negative positive sign matrix B need to follow matrix A

Dear all experts.

After all I got A=[ -1 3 -2 4 6]. For A, the value is not important. But the negative or positive sign is very important here. And also I have B=[2.1 2.2 4.2 4.5 5.8], the value of B are all positive . B value is very important because I need to get the sum of B. But before that, B need to follow negative sign as A. Therefore B become B=[-2.1 2.2 -4.2 4.5 5.8] before I want to sum it up. Really need help from all experts. Thank you in advance.

Answer 1

[Rik]

The sign function seems an obvious choice:

A=[ -1  3  -2  4    6];
B=[2.1   2.2   4.2   4.5   5.8];
C=sign(A).*B

C = 1×5

-2.1000 2.2000 -4.2000 4.5000 5.8000

sum(C)

ans = 6.2000

[Noriham B]

thank you so much sir. May God bless you. Its really work.

[Rik]

You're welcome