Programmer Guide/Command Reference/EVAL/sig2osp: Difference between revisions
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{{DISPLAYTITLE:{{SUBPAGENAME}}}} | {{DISPLAYTITLE:{{SUBPAGENAME}}}} | ||
Convert an amplitude spectrum to an order spectrum. | |||
;Usage: | |||
:<code>sig2osp(<var>x</var>, <var>sr</var>, <var>f1</var> {, <var>do</var>, <var>no</var>, <var>oini</var>})</code> | |||
:;<var>a</var>:amplitude or power spectrum (vector) | |||
:;<var>sr</var>:signal sampling rate in Hz; 0 < ''sr'' | |||
:;<var>f1</var>:frequency of the 1st order in Hz; 0 < ''f1'' < ''sr''/4 | |||
:;<var>do</var>:resolution of the order spectrum; 0 < ''do'' (default=0.1) | |||
:;<var>no</var>:length of the order spectrum; 2 < ''no'' (default=500) | |||
:;<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. | |||
;Result: The order spectrum ''o'' (vector with ''no'' elements). | |||
;See also: [[Programmer_Guide/Command_Reference/EVAL/ticks2f1|ticks2f1]], [[Programmer_Guide/Command_Reference/EVAL/asp2osp|asp2osp]], [[Programmer_Guide/Command_Reference/EVAL/otrack1|otrack1]] | |||
[[Programmer_Guide/Command_Reference/EVAL#Functions|<function list>]] | |||
Revision as of 14:47, 13 April 2011
Convert an amplitude spectrum to an order spectrum.
- 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 Programmer Guide/Command Reference/EVAL/asp2osp is used to convert the frequency spectrum to an order spectrum.
- Result
- The order spectrum o (vector with no elements).
