./toolbox
dcdecimate.pro

Last modification date:

Wed Sep 28 13:27:10 2016

dcdecimate

procedure dcdecimate, dc, nchan, [startat=integer], [ok=variable]

This procedure decimates a spectrum (i.e. thins the spectrum by paring every nth channel). The dc argument is modified in place.

The frequency interval and reference channel are adjusted appropriately so that the x-axis labels for the decimated data are still appropriate.

This only works for spectral line data containers.

Examples

    get,index=1
    a = data_new()
    data_copy,!g.s[0],a
    show
    dchanning,a
    show,a
    dcdecimate,a,3
    show,a
    dcdecimate,a,3,startat=1
    show,a
 

Uses

data_valid seq

Version

$Id$

Parameters
dc in/out, required variable	data container (spectrum or continuum)
nchan in, required integer	choose every nth channel starting at startat.

Keywords
startat in, optional integer (def. 0)	The starting channel.
ok out, optional variable	Returns 1 if everything went ok, 0 if it did not (missing parameters, invalid or empty dc, bad startat)