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dcr.focus - Function

	Package	nrao
	Module	gbt
	Tool	dcr

Fit a parabola to a focus observation

Synopsis
focus(filename)

Arguments

filename		name of ascii file on disk
		Allowed:	string

Returns
boolean

Description
Read an ascii file containing focus values from a sequence of point/focus combinations, and fit a parbola to find the peak value on the curve.

Example

include 'dcr.g'
md := dcr('GBTdata.ms')  # suppose we have this data set on disk
md.focus('focus.data')

where in this case the file focus.data might have this form:

1.2   15.5
1.3   15.7
1.4   16.0
1.5   16.1
1.6   15.9
1.7   15.6
1.8   15.4