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bimams.ddids - Function

	Package	bima
	Module	bimams
	Tool	bimams

get the DATA_DESCRIPTION IDs (row numbers) associated with specified spectral window ids and polarization ids. The spectral window and polarization ids are or-ed within themselves and then anded together.

Synopsis
ddids(spwids, polids)

Description
Retrieve (1-based) DATA_DESCRIPTION IDs (row numbers) based on SPECTRAL_WINDOW IDs and polarization ids.

Arguments

spwids		The 1-based ids (row numbers) of the spectral windows in the SPECTRAL_WINDOWS subtable
		Allowed:	Vector of integers
		Default:	unset (all spectral windows)
polids		The 1-based ids (row numbers) of the desired polarizations in the POLARIZATION subtable.
		Allowed:	Vector of integers
		Default:	unset (all polarizations)

Returns
Vector of integers (empty vector of no specified ids are found)

Example

# get a list of data description ids 
# construct a bimams tool and assign it to a Glish variable named bms
bms := bimams('neptune.ms');
#  get the data description id associated with spectral window ids 5
# and 10 and polarizaion id 0
bms.ddid(spwids=[5,10],polids=0);

The result is [5,10].