./guide
boxcar.pro

Last modification date:

Wed Sep 28 13:27:08 2016

boxcar

procedure boxcar, width, [buffer=integer], [/decimate]

Smooth the primary data container (the PDC, !g.s[0]) with a boxcar of a certain width, in channels.

Replaces the contents of the data being smoothed with the smoothed data.

For odd width, this uses the built-in idl SMOOTH function. For even widths this uses doboxcar1d and the reference channel is moved left by 1/2 channel width.

Other buffers (0 to 15) can be used instead of the PDC by supplying a value for the buffer keyword.

For spectrum data containers, the frequency_resolution is set using estboxres

Examples

   getps, 25            ; get some data into the PDC
   copy,0,10            ; for use later in this example
   copy,0,11            ; also for use later
   boxcar, 3            ; 3 channel boxcar smooth
   boxcar, 5, buffer=10 ; 5 channel smooth on buffer 10
   show,10              ; show the smoothed result
   copy,11,0            ; unsmoothed copy back to the PDC
   boxcar, 5, /decimate ; with decimation
 

Uses

doboxcar1d dcextract

Version

$Id$

Parameters
width in, required integer	Width of boxcar in channels.

Keywords
buffer in, optional integer (def. 0)	global buffer number to use (0-15).
decimate in, optional boolean	If set, the data container is reduced - taking every width channels starting at channel 0.