Index exceeds matrix dimensions.

I've been fixing this code, now i have a problem in line 29, that says "Index exceeds matrix dimensions." how can I fix it ?

%T=1/pi;
t=-pi:pi/99:pi;
A=2;
w0=(2.*pi)*(1./t);
f=A*sin(t)
f1=abs(f);
figure(1) 

plot(t,f1)
%serie de fourier
%hold on

for n=1:2:40
    
y=f1+((2*A)/pi)*(sin(n*t)/n);
plot(t,y)      ;pause(.2)     
%hold off;

end
figure(2)
%fft
y2=f1+((2*A)/pi)*(sin(20*t)/20);
Fs=1500;
Ts=1./Fs;
L=1500;
tl=(0:L-1).*Ts;
y4=fft(y2);
P2=abs(y4./L);
P1=P2(1:L./2+1);
P1(2:end-1)=2*P1(2:end-1)
g= Fs*(0:(L/2))/L;
plot(handles.axes2,g,P1,'r')

Answer 1

[Shubham Gupta]

P2 is an array of dimesion 1x199 and L=1500. So, when you write :

P1=P2(1:L./2+1);

that means

P1 = P2(1:751);

So, indeces of P2 greater than 199 exceeds than it's maximum size of 199.

One way to correct this, will be to modify 'L' .

I hope it helps !

[Carlos Antonio Hernández Guerrero]

you're rigth, thank you so much, i already realized that it was something about the dimension but i can´t see where i had to modify, thanks