helplog.16: spectra, smoothing, filtering, boxcar

Frank Valdes wrote on Jan 31, 2005

NUMBER:	16
KEYWORDS:	spectra, smoothing, filtering, boxcar
DATE:	Mon Jan 31 09:37:58 MST 2005
FROM:	valdes

Q:	Is there any way in IRAF by which I can take a 5 point running
	average for a given specta (say spectra.imh).

A:	This can be done either with the SPLOT 's' key or with the task
	BOXCAR.  In both cases a moving average is also called "boxcar
	smoothing".  In SPLOT it is interactive for visual interaction.
	The result can be saved from SPLOT if you want.  Note that other
	tasks in the IMFILT package (see help imfilt) can be applied to 1D
	spectra as well as 2D.  The most common alternative to boxcar
	filtering is gaussian filtering.

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Last post on Jan 31, 2005