Help locating peaks
1 回表示 (過去 30 日間)
古いコメントを表示
Hello all,
Here's an interesting problem...I have a vector full of results that are plotted against their respective FFT bins. When I go to find their peaks using [pks, locs] = findpeaks(x)...LOCS are obviously not the values of the actual bins, but instead are just indices of the bins.
How could I match the bin values to these indices instead, much appreciated!
JT
0 件のコメント
採用された回答
Walter Roberson
2011 年 12 月 13 日
"values of the actual bins" is not well-defined here. Do you mean the frequency that corresponds to the bin number?
the DFT bins are spaced at intervals of Fs/N where N is the length of the DFT vector and Fs is the sampling frequency. The first bin is zero frequency.
Thus, ((sampling frequency) times (fft bin number minus one) divided by (length of fft result)) gives frequency associated with the bin number.
0 件のコメント
その他の回答 (0 件)
参考
Community Treasure Hunt
Find the treasures in MATLAB Central and discover how the community can help you!
Start Hunting!