how to solve a system of equations in matlab

hello,

How do I solve this system of equations in matlab for F(-2:2) ?

f(x)= x+2 if x<=0

-x+2 if x>0

Apparently you can't use an if for this solution, but I don't really understand why either.

Thanks in advance

Answer 1

[Alan Stevens]

Try this

f = @(x) (x+2).*(x<=0) + (-x+2).*(x>0);

(x<=0) returns 1's where it's true and 0 where it's false. Similarly for (x>0)

[Jens Petit-jean]

aaahhh thanks!

Answer 2

[Ameer Hamza]

An alternate from symbolic toolbox

syms x

F = piecewise(x<=0, x+2, x>0, -x+2);
fplot(F, [-2 2])