Programmer Guide/Command Reference/EVAL/sig2osp: Difference between revisions
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{{DISPLAYTITLE:{{SUBPAGENAME}}}} | {{DISPLAYTITLE:{{SUBPAGENAME}}}} | ||
Compute the order spectrum of a signal. | |||
;Usage: | ;Usage: | ||
:<code>sig2osp(<var>x</var>, <var>sr</var>, <var>f1</var> {, <var>do</var>, <var>no</var>, <var>oini</var>})</code> | :<code>sig2osp(<var>x</var>, <var>sr</var>, <var>f1</var> {, <var>do</var>, <var>no</var>, <var>oini</var>})</code> | ||
| Line 9: | Line 9: | ||
:;<var>no</var>:length of the order spectrum; 2 < ''no'' (default=500) | :;<var>no</var>:length of the order spectrum; 2 < ''no'' (default=500) | ||
:;<var>oini</var>:amplitude value for order spectrum initialization (default=0) | :;<var>oini</var>:amplitude value for order spectrum initialization (default=0) | ||
;Description 1: The function computes the amplitude spectrum of the signal ''x'' using a radix-2 fft. The signal is expanded with zeros to the next possible fft transformation length if necessary. The same resampling algorithm as used by the function [[../asp2osp]] is used to convert the frequency spectrum to an order spectrum. | ;Description 1: The function computes the amplitude spectrum of the signal ''x'' using a radix-2 fft. The signal is expanded with zeros to the next possible fft transformation length if necessary. The same resampling algorithm as used by the function [[../asp2osp|asp2osp]] is used to convert the frequency spectrum to an order spectrum. | ||
;Result: The order spectrum ''o'' (vector with ''no'' elements). | ;Result: The order spectrum ''o'' (vector with ''no'' elements). | ||
;See also: [[../ticks2f1|ticks2f1]], [[../asp2osp|asp2osp]], [[../otrack1|otrack1]] | |||
[[../#Functions|<function list>]] | |||
Revision as of 14:50, 13 April 2011
Compute the order spectrum of a signal.
- Usage
sig2osp(x, sr, f1 {, do, no, oini})- a
- amplitude or power spectrum (vector)
- sr
- signal sampling rate in Hz; 0 < sr
- f1
- frequency of the 1st order in Hz; 0 < f1 < sr/4
- do
- resolution of the order spectrum; 0 < do (default=0.1)
- no
- length of the order spectrum; 2 < no (default=500)
- oini
- amplitude value for order spectrum initialization (default=0)
- Description 1
- The function computes the amplitude spectrum of the signal x using a radix-2 fft. The signal is expanded with zeros to the next possible fft transformation length if necessary. The same resampling algorithm as used by the function asp2osp is used to convert the frequency spectrum to an order spectrum.
- Result
- The order spectrum o (vector with no elements).
- See also
- ticks2f1, asp2osp, otrack1
