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Last change
on this file since 169 was
169,
checked in by pinsard, 15 years ago
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add compile_opt idl2, strictarrsubs and subsequent modifications
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-
Property svn:keywords set to
Id
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File size:
396 bytes
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| Line | |
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| 1 | ;+ |
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| 2 | ; |
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| 3 | ; From a time serie of length T=tinc*N |
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| 4 | ; Return power spectrum and array of periods |
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| 5 | ; |
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| 6 | ; @version |
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| 7 | ; $Id$ |
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| 8 | ; |
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| 9 | ;- |
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| 10 | FUNCTION spectrum, ts, tinc |
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| 11 | ; |
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| 12 | compile_opt idl2, strictarrsubs |
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| 13 | ; |
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| 14 | N=n_elements(ts) |
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| 15 | N21 = N/2 |
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| 16 | ps=ABS(FFT(ts, -1)) |
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| 17 | ps=ps[0:N21-1] |
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| 18 | |
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| 19 | period=tinc*N/(findgen(N21)+0.0000000000001) |
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| 20 | period[0]=99999999999. |
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| 21 | |
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| 22 | ret=findgen(2,N21) |
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| 23 | ret[1,*]=ps |
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| 24 | ret[0,*]=period |
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| 25 | |
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| 26 | return, ret |
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| 27 | end |
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