How do you solve a periodic function with more then 1 period?

How do you solve a periodic function with more than 1 period? I have a function with one period that has the code

f=@(x)2*mod(x,1)-1

This is for 1 period how do I adjust this to have 5 periods.

[merged from duplicate question]

Let f1(x) = 2x−1 for x ∈ [−1,+1) where this function is also extended periodically to the entire line (where each period is 2 units long). Plot it over 5 complete periods. Then define it as an anonymous function

Answer 1

[Star Strider]

See if this does what you want:

f=@(x)2*mod(x,1)-1

x = linspace(0, 5);

figure(1)
plot(x, f(x))
grid