I have to increase the number of Fourier frequencies by adding 500 zeros to the end of the 27-sample-long signal.

7 次查看（过去 30 天）

显示更早的评论

Chris 2021-10-24

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1570618-i-have-to-increase-the-number-of-fourier-frequencies-by-adding-500-zeros-to-the-end-of-the-27-sample

回答： Image Analyst 2021-10-24

fs = 250;

t = 0:1/fs:0.107;

L = length(t);

x1 = sin(2*pi*50*t)+0.3;

fftx1=fft(x1)

freqHz = (0:1:length(x1)-1)*fs/L;

plot(freqHz,fftx1,'-o')

I have to increase the number of Fourier frequencies by adding 500 zeros to the end of the 27-sample-long signal.

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

回答（1 个）

Image Analyst 2021-10-24

1
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/1570618-i-have-to-increase-the-number-of-fourier-frequencies-by-adding-500-zeros-to-the-end-of-the-27-sample#answer_815298

Again, another duplicate question answered here:

https://www.mathworks.com/matlabcentral/answers/1570303-how-to-add-zero-points-in-a-function#comment_1797503

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

类别

Signal Processing Signal Processing Toolbox Transforms, Correlation, and Modeling Transforms Discrete Fourier and Cosine Transforms Fast Fourier Transforms

在 Help Center 和 File Exchange 中查找有关 Fast Fourier Transforms 的更多信息

标签

产品

MATLAB

Community Treasure Hunt

Find the treasures in MATLAB Central and discover how the community can help you!

Translated by