Discrete Fourier transform: Revision history

Filter revisionsshowhide

To date:

Tag filter:

Invert selection

External tools:

For any version listed below, click on its date to view it. For more help, see Help:Page history and Help:Edit summary. (cur) = difference from current version, (prev) = difference from preceding version, m = minor edit, → = section edit, ← = automatic edit summary

curprev 12:5512:55, 30 April 2024‎ Bob K talk contribs‎ 69,595 bytes 0‎ move a misplaced image. (not really sure where the best place is) undo Tag: Visual edit: Switched

curprev 14:4914:49, 18 April 2024‎ ClueBot NG talk contribs‎ m 69,595 bytes −21‎ Reverting possible vandalism by Muni gmc to version by OAbot. Report False Positive? Thanks, ClueBot NG. (4315987) (Bot) undo Tag: Rollback
curprev 14:4914:49, 18 April 2024‎ Muni gmc talk contribs‎ 69,616 bytes +21‎ No edit summary undo Tag: Reverted

curprev 03:4703:47, 8 April 2024‎ OAbot talk contribs‎ m 69,595 bytes +20‎ Open access bot: doi updated in citation with #oabot. undo

curprev 20:1720:17, 28 March 2024‎ Ivyyang997 talk contribs‎ m 69,575 bytes −3‎ Deleted extra white space before the sentence. undo Tag: Visual edit

curprev 15:4515:45, 9 March 2024‎ BD2412 talk contribs‎ m 69,578 bytes +2‎ clean up spacing around commas and other punctuation fixes, replaced: ,M → , M, ,N → , N (8), ,X → , X (2), ,b → , b, ,d → , d (2), ,k → , k (2), ,n → , n (2), ,x → , x (2), , → , , , , → , undo Tag: AWB

curprev 14:1514:15, 8 March 2024‎ Bob K talk contribs‎ 69,576 bytes +94‎ update a citation IAW author's wishes undo

curprev 15:0015:00, 5 March 2024‎ Bob K talk contribs‎ 69,482 bytes +189‎ add a footnote undo Tag: Visual edit: Switched

curprev 13:4013:40, 4 March 2024‎ Bob K talk contribs‎ 69,293 bytes −92‎ Undid revision 1211763476. The formula Fs/N is derived from the statement that precedes it: "The fundamental frequency is the reciprocal of the fundamental period"... quoting your own reference. So instead of deleting the equivalent statement from Wikipedia, you should find another place for the formula, such as a footnote. undo Tag: Undo
curprev 09:0009:00, 4 March 2024‎ 73.78.66.80 talk‎ 69,385 bytes +92‎ Correct information about sampling rate of DTFT undo Tag: Reverted

curprev 18:5218:52, 5 January 2024‎ Bob K talk contribs‎ 69,293 bytes −438‎ →‎Definition: last paragraph: remove a pedantic example undo
curprev 18:4318:43, 5 January 2024‎ Bob K talk contribs‎ 69,731 bytes −191‎ →‎Definition: attempt to simplify a wordy explanation undo Tag: Visual edit: Switched

curprev 19:2919:29, 4 January 2024‎ Bob K talk contribs‎ 69,922 bytes −1,425‎ replace an erroneous formula (Eq.2). remove a redundant formula (Eq.3). remove non-helpful image. move a paragraph. undo Tag: Visual edit: Switched
curprev 08:0608:06, 4 January 2024‎ 2a01:e0a:9cc:53c0:f447:fe18:d681:630a talk‎ 71,347 bytes +740‎ Add a subsection about the uniqueness of the Discrete Fourier Transform just after the subsection "Circular convolution theorem" undo

curprev 18:2218:22, 16 November 2023‎ François Robere talk contribs‎ 70,607 bytes −12‎ Layout undo

curprev 21:5021:50, 22 September 2023‎ Cirosantilli2 talk contribs‎ m 70,619 bytes −10‎ odd function -> symmetric undo
curprev 21:4921:49, 22 September 2023‎ Cirosantilli2 talk contribs‎ 70,629 bytes +434‎ Add a simple transform graph example that allows readers to understand every point of the transform. undo

curprev 20:5520:55, 8 May 2023‎ D.Lazard talk contribs‎ m 70,195 bytes −10‎ Reverted 1 edit by 182.185.118.67 (talk) to last revision by 2601:541:4580:8500:4451:73F9:8CF:A5C1 undo Tags: Twinkle Undo
curprev 18:3718:37, 8 May 2023‎ 182.185.118.67 talk‎ 70,205 bytes +10‎ →‎Definition undo Tags: Reverted Visual edit

curprev 16:0616:06, 25 April 2023‎ 2601:541:4580:8500:4451:73f9:8cf:a5c1 talk‎ 70,195 bytes −1‎ edit undo

curprev 16:4016:40, 3 April 2023‎ Hellacioussatyr talk contribs‎ 70,196 bytes +50‎ →‎Example undo Tag: 2017 wikitext editor

curprev 12:5012:50, 2 April 2023‎ Regr4444 talk contribs‎ m 70,146 bytes 0‎ →‎Inverse transform: Make inverse transform formula more consistent with definition (Eq.1) undo

curprev 23:3823:38, 19 March 2023‎ 93.175.5.28 talk‎ 70,146 bytes +1‎ →‎The unitary DFT: Small mistakes undo

curprev 04:2704:27, 10 March 2023‎ 120.151.44.39 talk‎ 70,145 bytes +7‎ First use of the acronym IDFT should be beside a definition. It is used later without this. Corrected by adding the IDFT acronym to first mention of Inverse DFT. undo

curprev 21:5421:54, 6 March 2023‎ Thenub314 talk contribs‎ 70,138 bytes −90‎ →‎References: Copyvio undo

curprev 17:5917:59, 5 March 2023‎ MaxwellMolecule talk contribs‎ 70,228 bytes +125‎ nonconstructive undo Tag: Manual revert
curprev 17:3617:36, 5 March 2023‎ 174.212.227.145 talk‎ 70,103 bytes −49‎ No edit summary undo Tags: Reverted Visual edit Mobile edit Mobile web edit
curprev 17:3517:35, 5 March 2023‎ 174.212.227.145 talk‎ 70,152 bytes −76‎ No edit summary undo Tags: Reverted Visual edit Mobile edit Mobile web edit

curprev 01:5701:57, 21 February 2023‎ Citation bot talk contribs‎ 70,228 bytes +99‎ Add: s2cid, doi, series. Upgrade ISBN10 to 13. | Use this bot. Report bugs. | Suggested by Corvus florensis | #UCB_webform 2868/3499 undo

curprev 13:4013:40, 9 February 2023‎ Bob K talk contribs‎ 70,129 bytes −5‎ Undid revision 1137407096 by Headbomb (talk) agreeing with The Sublimis, who fixed an error introduced 2020-01-30 by 68.97.61.174. Note that the revert made by Headbomb results in text that does not agree with the math below it. undo Tag: Undo

curprev 13:3813:38, 4 February 2023‎ Headbomb talk contribs‎ m 70,134 bytes +5‎ Reverted edits by The Sublimis (talk) to last version by 2601:541:4580:8500:88F7:DFF7:A61A:2F95 undo Tags: Rollback Reverted
curprev 13:3513:35, 4 February 2023‎ The Sublimis talk contribs‎ 70,129 bytes −5‎ →‎Shift theorem undo Tag: Reverted

curprev 11:1311:13, 29 January 2023‎ 2601:541:4580:8500:88f7:dff7:a61a:2f95 talk‎ 70,134 bytes 0‎ change link undo

curprev 15:5115:51, 26 January 2023‎ Kku talk contribs‎ m 70,134 bytes +4‎ link dot product using Find link undo

curprev 14:1814:18, 24 January 2023‎ PointedEars talk contribs‎ m 70,130 bytes −8‎ →‎Definition: Removed extra undo Tags: Mobile edit Mobile app edit Android app edit

curprev 23:3023:30, 22 January 2023‎ Bob K talk contribs‎ 70,138 bytes −2,268‎ →‎Definition: Replace pedantic physical interpretation with WikiLinks to more appropriate articles. Also, the replaced notation was incongruous with this and other closely-related articles and with the adjacent figure. undo Tag: Visual edit

curprev 18:0718:07, 21 January 2023‎ 86.9.212.233 talk‎ 72,406 bytes +292‎ →‎Definition: added an example to physical interpretation undo

curprev 21:2921:29, 17 January 2023‎ SchrodingersBee talk contribs‎ 72,114 bytes +484‎ →‎The unitary DFT: added examples inc Hadamard. undo
curprev 21:1721:17, 17 January 2023‎ SchrodingersBee talk contribs‎ 71,630 bytes +2,233‎ →‎Definition: Added a paragraph on the physical interpretation of the frequency spectrum (perhaps this should be in its own section)? undo

curprev 04:3604:36, 28 December 2022‎ Barryfrancissmith talk contribs‎ m 69,397 bytes +2‎ Typo in the trigonometric interpolation polynomial for N odd. See the formula at https://en.wikipedia.org/wiki/Trigonometric_interpolation. Notationally the previous form was nonsense, having a 2\pi in the expression on the left side of the ... while a \pi on the right hand side; also compare the forms with the even N case. undo Tag: Visual edit

curprev 04:1904:19, 4 December 2022‎ Rlink2 talk contribs‎ m 69,395 bytes +163‎ →‎Further reading: Adding archives WP:LINKROT undo Tag: AWB

curprev 14:1814:18, 18 November 2022‎ 2603:7081:5d00:2800:d49d:4207:f51f:d4bf talk‎ 69,232 bytes 0‎ →‎Spectral analysis: Made the graph clearer by increasing pixels undo Tags: Mobile edit Mobile web edit

curprev 13:0513:05, 1 November 2022‎ Bob K talk contribs‎ 69,232 bytes +124‎ add a footnote undo
curprev 13:0013:00, 1 November 2022‎ Bob K talk contribs‎ 69,108 bytes −23‎ Undid revision 1119401524 by 161.23.167.135 (talk) The non-zero components of a DTFT of a periodic sequence is a discrete set of frequencies identical to the DFT. undo Tag: Undo
curprev 11:3311:33, 1 November 2022‎ 161.23.167.135 talk‎ 69,131 bytes +23‎ →‎Motivation undo Tag: Reverted

curprev 07:3707:37, 22 October 2022‎ Nuretok talk contribs‎ 69,108 bytes +123‎ →‎Example: Cleanup undo Tag: Visual edit: Switched

curprev 13:4413:44, 4 August 2022‎ Afpage talk contribs‎ m 68,985 bytes −98‎ →‎References: Updated dead link Santhanam, Balu; Santhanam, Thalanayar S. undo
curprev 09:5109:51, 4 August 2022‎ ManuDiTango talk contribs‎ m 69,083 bytes +393‎ →‎Circular convolution theorem and cross-correlation theorem undo

curprev 20:4420:44, 31 May 2022‎ ComandiDosEAltro talk contribs‎ 68,690 bytes +2‎ →‎Polynomial multiplication: The circular convolution formula was wrong, reverted edited by Mamir2230, 16 July 2020 undo Tag: Visual edit

curprev 07:1707:17, 14 May 2022‎ Bruce1ee talk contribs‎ m 68,688 bytes 0‎ Reverted edits by 5.47.61.119 (talk) to last version by Hermis128 undo Tag: Rollback

30 April 2024

18 April 2024

8 April 2024

28 March 2024

9 March 2024

8 March 2024

5 March 2024

4 March 2024

5 January 2024

4 January 2024

16 November 2023

22 September 2023

8 May 2023

25 April 2023

3 April 2023

2 April 2023

19 March 2023

10 March 2023

6 March 2023

5 March 2023

21 February 2023

9 February 2023

4 February 2023

29 January 2023

26 January 2023

24 January 2023

22 January 2023

21 January 2023

17 January 2023

28 December 2022

4 December 2022

18 November 2022

1 November 2022

22 October 2022

4 August 2022

31 May 2022

14 May 2022