Why does matlab not show the right graph?

    if true
      % code
clc;
close all;
clear all;
T=0.5; % time period
Ts=0.0005; %use 1000 points to produce one period (N=1000)
t=-1:Ts:1-Ts; % time axis
x=sawtooth(2*pi*0.2*(t-T/2)); % sawtooth function
plot(t,x)
grid on
    end

I want to make bipolar sawtooth with period 0.5 s. It should turn out like this (same period, different amplitude with my question)

But,it turns out very different on matlab

My problems are: 1. Is there anything wrong with my code? 2. How to know make plot with more detail like the graph on the left side?

Answer 1

[Image Analyst]

Multiply sawtooth() by 3 to change the amplitude.

In (t-T/2), adjust the amount you add or subtract to shift the waveform left or right.