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matrix dimension must agree

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Carlos Antonio Hernández Guerrero
回答： Shubham Gupta 2019-9-27
I have this code and i wanna plot the fourier serie of my signal in frecuency, I've been traying to plot it but in the line 25 i have an error "matrix dimension mut agree" and i can't fix it. could someone help me with this ?
%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
Fs=5*t;
Ts=1./Fs;
L=1500;
tl=(0:L-1).*Ts;
y4=fft(f1);
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')
  2 个评论
Shubham Gupta
Shubham Gupta 2019-9-23
In line,
tl=(0:L-1).*Ts;
Ts is of dimension 1x199 and you are muliplying it with a vector of dimesion 1x1500.
Since, you are doing element wise multiplication, size of arrays being multiplied should be equal.
One way to solve this is to modify 'L' to match the size of 'Ts' for element-wise multiplication
I hope this helps !

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回答（1 个）

Shubham Gupta
Shubham Gupta 2019-9-27
In line,
tl=(0:L-1).*Ts;
Ts is of dimension 1x199 and you are muliplying it with a vector of dimesion 1x1500.
Since, you are doing element wise multiplication, size of arrays being multiplied should be equal.
One way to solve this is to modify 'L' to match the size of 'Ts' for element-wise multiplication
I hope this helps !

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