Function for Script. I need to write a Function that selects the positive and negative numbers from a matrix. How to write this?

29 views (last 30 days)
I need to write a Function that selects the positive and negative numbers from a matrix. How to write this?

Accepted Answer

dpb
dpb on 21 Jan 2015
function [p,n]=splitsigns(x)
% return positive/negative values from array x in vectors p/n, respectively
p=x(x>0);
n=x(x<0);
This one excludes 0; pick where you want those if do...
  7 Comments
dpb
dpb on 22 Jan 2015
Read the help files on functions, but in general yes. Other than I'd say that p=x(x>0); and n=x(x<0); are expressions, not variables. There are no strictly local variables in those functions, only the input/output arguments (which are, of course variables just not local).

Sign in to comment.

More Answers (1)

John Petersen
John Petersen on 21 Jan 2015
a = 0.5 - rand(3,3);
%Positive numbers
a(a>=0)
% negative numbers
a(a>0)

Categories

Find more on Graphics Objects in Help Center and File Exchange

Community Treasure Hunt

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

Start Hunting!