清空筛选条件
清空筛选条件

FFT of sine function

2 次查看（过去 30 天）
Namira
Namira 2018-5-25
回答： sloppydisk 2018-5-25
I am trying to plot power of sine function. When I do FFT of sine wave I got two peaks for a single sin function. I don't know understand it. Why do I get two frequency spikes from a simple sin function via FFT? How can I get only one peak for a single sin function?

请先登录，再回答此问题。

回答（1 个）

sloppydisk
sloppydisk 2018-5-25
You'll get both positive and negative frequencies, see
doc fft
for an example of a single-sided spectrum, i.e. only positive frequencies.

类别

在 Help Center 和 File Exchange 中查找有关 Fourier Analysis and Filtering 的更多信息

标签

Community Treasure Hunt

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

Start Hunting!

Translated by