Adjusting a Sawtooth Graph and getting spectrum

I am trying to graph a traingle wave with a width of 8000pi (4000pi each way from 0) and get its spectrum. This is what I have but can't get figure 1 to look right. I am unsure what I am doing wrong, my best guess would be I need to change either T or the first variable in sawtooth but doing that keeps making it worse so I'm not sure. Thank you for your time!

T = 10*50;

fs = 2000;

t = 0:1/fs:T-1/fs;

x = sawtooth(pi*4000*t,1/2);

figure(1)

plot(t,x)

grid on

figure(2)

pspectrum(x,fs,'Leakage',0.91)

Answer 1

[Paul]

Do you want a triangle or a sawtooth? Assuming the former as stated in the question, use tripuls

%T = 10*50;
fs = 2000;
t = -4000*pi:1/fs:4000*pi;
numel(t)  % lots of data points

ans = 50265483

x = tripuls(t,pi*8000,0);
figure(1)
plot(t,x)
xline(4000*pi);xline(-4000*pi);

[S]

Oh thank you! So to make it go from -4000pi to 4000pi on the horizontal axis would I change the x=triplus line?

[Paul]

The time vector already spans -4000*pi to 4000*pi. I added some lines to the plot to make that clear.

[S]

oh thank you very much!