Finding index of a maximum value in an FFT

1 次查看（过去 30 天）

Marek Andrzej 2016-11-30

0
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/314648-finding-index-of-a-maximum-value-in-an-fft

评论： Marek Andrzej 2016-11-30

In a simple model I graph my FFT and I can clearly see the index of the peak value, but I can't get it "mathematically" so to speak. I tried peak finder but couldn't get it to work. Attaching my results.

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）

KSSV 2016-11-30

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/314648-finding-index-of-a-maximum-value-in-an-fft#answer_245275

doc max

3 个评论
显示 1更早的评论隐藏 1更早的评论

KSSV 2016-11-30

It is a function......Read the documentation of max

Marek Andrzej 2016-11-30

I used max in the past for same task in matlab, but simulink counterpart doesn't seem to be helpful. Both peak finder and maximum blocks gave me the same index, which is hardly correlate-able to 50Hz wave. buffer outputs 4096 points of data and Pad adds 4096 zeros.

请先登录，再进行评论。

请先登录，再回答此问题。