Vectors must be the same length
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N1=64;
Y1=fft(y,N1);
x= (0:29);
subplot(3,1,2)
plot(x,abs(Y1))
xlabel('Frequency (Hz)');
ylabel('Amplitude');
%HOW TO MAKE IT SAME LENGTH?(LINE5)
采纳的回答
Star Strider
2021-11-27
The number of elements in ‘Y1’ in the plot need to be the same as the number in ‘x’ so one way would be to re-define ‘x’ to be the desired length with respect to ‘Y1’ and another would be:
plot(x,abs(Y1(1:numel(x))))
Use the approach that gives the desired result.
.
5 个评论
Mya
2021-11-27
Mya
2021-11-27
Star Strider
2021-11-27
It is not necessary toi make the entire vector the same size, only the range desired in the plot. That is what the code I posted does.
To make ‘x’ the same size as ‘Y1’ create it as:
x = linspace(0, numel(Y1), numel(Y1));
The length of ‘Y1’ is fixed by ‘N’ and since that governs everythin else, it creates another option:
x = 0:N-1;
Choose the one that gives the desired result.
.
Mya
2021-11-27
Star Strider
2021-11-27
As always, my pleasure!
.
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