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<task type="function" name="oldsplit" category="manipulation" visibility="hidden">
<shortdescription>Create a visibility subset from an existing visibility set</shortdescription>
T H I S T A S K I S D E P R E C A T E D
I T W I L L B E R E M O V E D S O O N
Oldsplit is the general purpose program to make a new data set that is a
subset or averaged form of an existing data set. Oldsplit is often used after the initial calibration of the data to make a
smaller measurement set with only the data that will be used in
further flagging, imaging and/or self-calibration. Oldsplit includes
general selection parameters and can average over frequency (channels) and time (integrations).
<param type="string" name="vis" mustexist="true">
<description>Name of input MeasurementSet
Example: vis='ngc5921.ms'
<param type="string" name="outputvis" mustexist="false">
<description>Name of output measurement set
Example: outputvis='ngc5921_src.ms'
<param type="string" name="datacolumn" ignorecase="True">
<description>Data column(s) to Oldsplit out
Options: 'data', 'model', 'corrected', 'all',
'float_data', 'lag_data', 'float_data,data', and
Example: datacolumn='data'
Note: 'all' = whichever of the above that are
present. Otherwise the selected column will go to
DATA (or FLOAT_DATA) in the output. Splitting with
the default datacolumn='corrected' before clean is
normally required for self-calibration!
<allowed kind="enum" ignorecase="True">
<value>data,model,corrected</value>
<value>float_data</value>
<value>float_data,data</value>
<value>lag_data,data</value>
<param type="any" name="field">
<description>Select field using ID(s) or name(s)
(Run listobs to obtain list of field IDs and names)
If field string is a non-negative integer, it is
assumed to be a field index otherwise, it is assumed
field='0~2'; field ids 0,1,2
field='0,4,5~7'; field ids 0,4,5,6,7
field='3C286,3C295'; fields named 3C286 and 3C295
field = '3,4C*'; field id 3, all names starting with
<any type="variant" limittypes="string stringArray int intArray"/>
<value type="string"></value>
<param type="any" name="spw">