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Version 1.9 Build 1488

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atcafiller.select - Function

	Package	atnf
	Module	atca
	Tool	atcafiller

Select the data to fill

Synopsis
select(firstscan, lastscan, lowfreq, highfreq, freqchain, fields, bandwidth1, numchan1)

Arguments

firstscan		first scan to read
		Allowed:	Positive Int
		Default:	1
lastscan		last scan to read
		Allowed:	Positive Int
		Default:	9999
lowfreq		lowest reference freq to select in GHz
		Allowed:	Double
		Default:	0.1
highfreq		highest reference freq to select in GHz
		Allowed:	Double
		Default:	1000.0
freqchain		select one of the simultaneous frequencies, 0=both
		Allowed:	Int
		Default:	0
fields		list of field names (sources) to select
		Allowed:	Vector of Strings
		Default:	''
bandwidth1		select on bandwidth (MHz) of the first frequency chain, 0=all
		Allowed:	Int
		Default:	0
numchan1		select on number of channels in first frequency chain, 0=all
		Allowed:	Int
		Default:	0

Description

Select on various items, to load only a subset of the data present in the input file. The default is to load everything. Note that the frequency selection using lowfreq and highfreq acts purely on center (reference) frequencies, channel selection is not available at this stage. Use freqchain to select the frequency chain (or IF) to load, specify either 1 or 2, the default of zero will load both. Use the fields parameter to specify a list of field names (sources) you want to load. For detailed selection of complex observations the last two parameters let you specify the required bandwidth (in whole MHz) and number of channels of the first frequency chain.

Returns
Bool

Example
Select scans 4 to 10 inclusive, frequency chain 1, all data with a reference frequency of more than 1.4 GHz.

- rpf := atcafiller('myms', '/data/RPFITS/1999-01-01_0101.C999');
- rpf.select(firstscan=4, lastscan=10, freqchain=1, lowfreq=1.4)
- rpf.fill();
- rpf.done();