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Diffstat (limited to 'help/en_US/periodogram.xml')
| -rw-r--r-- | help/en_US/periodogram.xml | 32 |
1 files changed, 26 insertions, 6 deletions
diff --git a/help/en_US/periodogram.xml b/help/en_US/periodogram.xml index 5ad8738..5566e39 100644 --- a/help/en_US/periodogram.xml +++ b/help/en_US/periodogram.xml @@ -24,9 +24,7 @@ <refsynopsisdiv> <title>Calling Sequence</title> <synopsis> - [PXX, W] = periodogram (X) - [PXX, W] = periodogram (X, WIN) - [PXX, W] = periodogram (X, WIN, NFFT) + [PXX, W] = periodogram (X, WIN, NFFT, FS) [PXX, W] = periodogram (..., "RANGE") </synopsis> @@ -56,8 +54,30 @@ The optional second output W are the normalized angular frequencies. For a one- <para> If a sampling frequency is specified, FS, then the output frequencies F will be in the range [0, FS/2] or [0, FS/2) for one-sided calculations. For two-sided calculations the range will be [0, FS). </para> - <para> -When called with no outputs the periodogram is immediately plotted in the current figure window. -</para> + +</refsection> + +<refsection> + <title>Examples</title> + <programlisting role="example"><![CDATA[ +n=0:319; +x=cos(%pi/4*n)+rand(size(n,"r"),"normal"); +[pxx,w]=periodogram(x,ones(1,320),256,2000,"onesided"); +plot2d(w,10*log10(pxx)) +xtitle('periodogram','frequency','magnitude(db)') +xgrid() + ]]></programlisting> +<scilab:image> +n=0:319; +x=cos(%pi/4*n)+rand(size(n,"r"),"normal"); +[pxx,w]=periodogram(x,ones(1,320),256,2000,"onesided"); +plot2d(w,10*log10(pxx)) +xtitle('periodogram','frequency','magnitude(db)') +xgrid() +</scilab:image> + + </refsection> + + </refentry> |