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Last change
on this file since 9 was
2,
checked in by post_it, 17 years ago
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Initial import from ~/POST_IT/
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File size:
331 bytes
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| Line | |
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| 1 | function spectrum, ts,tinc |
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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 | N=n_elements(ts) |
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| 7 | N21 = N/2 |
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| 8 | ps=ABS(FFT(ts, -1)) |
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| 9 | ps=ps(0:N21-1) |
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| 10 | |
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| 11 | period=tinc*N/(findgen(N21)+0.0000000000001) |
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| 12 | period(0)=99999999999. |
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| 13 | |
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| 14 | ret=findgen(2,N21) |
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| 15 | ret(1,*)=ps |
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| 16 | ret(0,*)=period |
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| 17 | |
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| 18 | return, ret |
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| 19 | end |
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