Differences
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| Both sides previous revisionPrevious revisionNext revision | Previous revision | ||
| time_series:fft [2014/08/11 19:25] – phreazer | time_series:fft [2014/08/11 22:02] (current) – phreazer | ||
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| Line 2: | Line 2: | ||
| $\hat{a}_k = \sum^{N-1}_{j=0} e^{-2\pi * i * \frac{jk}{N}} * \hat{a}_j$ | $\hat{a}_k = \sum^{N-1}_{j=0} e^{-2\pi * i * \frac{jk}{N}} * \hat{a}_j$ | ||
| - | |||
| - | $e^-i\dots$ | ||
| Komplexe Exponentialfunktion: | Komplexe Exponentialfunktion: | ||
| Line 18: | Line 16: | ||
| k => Anzahl der Zyklen. | k => Anzahl der Zyklen. | ||
| + | Positive Zahlen => | ||