Timeline for Help with Frequency Identification with Fourier? [duplicate]
Current License: CC BY-SA 3.0
17 events
| when toggle format | what | by | license | comment | |
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| May 20, 2017 at 0:45 | comment | added | user3769181 | @Hugh, I just made a new question here: mathematica.stackexchange.com/questions/146456/… | |
| May 19, 2017 at 1:01 | history | edited | user3769181 | CC BY-SA 3.0 | added 507 characters in body |
| May 18, 2017 at 15:29 | comment | added | Hugh | I had a look at the data. I do not see a strong periodic behaviour either in the original data or in the Fourier transform of the data. If you look at your second plot what period do you think you see in the data? If you have 1) reason to suspect a periodicity 2) other evidence for periodic behaviour or 3) wish to force a periodic behaviour into the data then you probably could. This question has been marked as a duplicate so I can't show my investigation. If you wish to continue along these lines then I suggest you start a new question with a new heading. | |
| May 18, 2017 at 2:36 | history | edited | user3769181 | CC BY-SA 3.0 | added 457 characters in body |
| May 18, 2017 at 2:31 | review | Reopen votes | |||
| May 18, 2017 at 15:58 | |||||
| May 18, 2017 at 2:29 | comment | added | user3769181 | @Hugh: Okay, I just updated my post to include a sample series (I'm working with well over 50 series, so I promise, you don't want them all), and I'm about to upload graphs for that sample. | |
| May 18, 2017 at 2:13 | history | edited | user3769181 | CC BY-SA 3.0 | added 901 characters in body |
| May 17, 2017 at 20:51 | comment | added | Hugh | I think we need to see your spectra. Are your peaks harmonics I.e. multiples of a fundamental frequency. ? A trig representation is possible. | |
| May 17, 2017 at 20:46 | comment | added | user3769181 | @Hugh, I'll update with some sample data as soon as I'm able, but I think I've mostly got it. If my Fourier results have many (6+) peaks, does that mean there's no specific period to the function? And is there a way to convert a given peak to a trig function that can be overlaid on the graph of the source data? | |
| May 16, 2017 at 11:30 | comment | added | Hugh | I have tried to add some extra information to the article here. However, I think you need to describe your difficulty more precisely for me to help you. Try to give us an example of your problem. | |
| May 15, 2017 at 22:30 | history | closed | Daniel Lichtblau Jens Michael E2 vapor m_goldberg | Duplicate of What do the X and Y axis stand for in the Fourier transform domain? | |
| May 15, 2017 at 22:14 | comment | added | user3769181 | @andre: That looks like exactly what I'm looking for. Is it necessary to pad to the right? And I'm not clear on how you converted the position of the peak to the period. Thank you! | |
| May 15, 2017 at 22:13 | comment | added | user3769181 | @Hugh: Thank you, that's some very helpful information; though one thing I'm actually still not clear on is, what do each of the axes represent with standard Fourier in Mathematica? | |
| May 14, 2017 at 21:05 | review | Close votes | |||
| May 15, 2017 at 22:34 | |||||
| May 14, 2017 at 21:02 | comment | added | Hugh | I have put some basic information on Fourier here. Let me know if this helps of if you need more. | |
| May 14, 2017 at 19:50 | comment | added | andre314 | related | |
| May 14, 2017 at 19:18 | history | asked | user3769181 | CC BY-SA 3.0 |