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Version 1.9 Build 1488

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bimams.chanwidths - Function

	Package	bima
	Module	bimams
	Tool	bimams

Get the channel widths of the specified type of windows

Synopsis
chanwidths(type)

Description
Get a Glish vector containing the channel widths (in Hz) for the specified type of windows. The order of the values in the returned vector is the same as the order of the type of windows specified in the SPECTRAL_WINDOWS subtable. For the multichannel data, the assumption is made that the channel width is constant within a given spectral window (note though that the measurement set specification permits varying channel widths within a window; in general however, channel widths within a spectral window are constant for BIMA data). The actual values which are returned are the widths of the first channels in each window.

Arguments

type		type of spectral window
		Allowed:	's' (sibeband average), 'c' (multi-channel data), or 'a' (multi-channel average)
		Default:	'c'

Returns
A Glish vector of doubles containing the channel widths of the multi-channel data spectral windows.

Example

# construct a bimams tool and assign it to a Glish variable named bms
bms := bimams('neptune.ms');
# get the widths of the channels in the multi-channel data windows of
# the underlying ms      
bms.chanwidths();

The result is [-48828.125 -3125000 -3125000 -48828.125 -3125000 -3125000 48828.125 3125000 3125000 48828.125 3125000 3125000]