Timeline for FFT analysis of binned data of different length
Current License: CC BY-SA 3.0
11 events
| when toggle format | what | by | license | comment | |
|---|---|---|---|---|---|
| Sep 23, 2014 at 15:26 | vote | accept | user10881 | ||
| Aug 23, 2014 at 19:46 | history | tweeted | twitter.com/#!/StackSignals/status/503267048068497408 | ||
| Aug 22, 2014 at 10:38 | comment | added | ThP | @user10881: My suggestion, using the Welch's method, results in the same fft length regardless of the data size. | |
| Aug 22, 2014 at 7:58 | comment | added | user10881 | @ Neeks: However, since they are not of the same length I believe that I need to, somehow, account for such discrepancy but haven't thought of a way yet. | |
| Aug 22, 2014 at 7:57 | comment | added | user10881 | @ Neeks: Thanks for your reply. In short, I am conducting open field experiments over a number of hours. I am binning my data according to wind direction. However, I am interested in continuous data of wind speed, so my wind direction bin is composed of several sets, each set being a continuous period of measurement. These sets are of unequal length because, for ex., in Set 1 I had 2500 data points of continuous readings and in Set 2 had 1000 data points. I am plotting the real amplitude of the sine wave on the y-axis (fft(data)/N/2). I wish to compare the fft amplitude of each set. | |
| Aug 22, 2014 at 7:56 | answer | added | Deve | timeline score: 0 | |
| Aug 22, 2014 at 4:34 | comment | added | Neeks | @user1088 : Interesting. Before I suggest anything, can you describe the data-set more precisely, that is what is the reason for unequal data length in each data-set. | |
| Aug 21, 2014 at 19:47 | comment | added | user10881 | thanks, but I do not have the same fft size that's the issue. | |
| Aug 21, 2014 at 14:12 | comment | added | ThP | You can use Welch's method to compute the averaged periodogram of each data set with the same FFT size. | |
| Aug 21, 2014 at 10:30 | review | First posts | |||
| Aug 21, 2014 at 10:55 | |||||
| Aug 21, 2014 at 10:26 | history | asked | user10881 | CC BY-SA 3.0 |