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Base - FrameSet base Frame index

Description:
This attribute gives the index of the Frame which is to be regarded as the "base" Frame within a FrameSet. The default is the first Frame added to the FrameSet when it is created (this Frame always has an index of 1).
Type:
Integer.
Class Applicability:
FrameSet
All FrameSets have this attribute.
Notes:
  • Inverting a FrameSet (inverting the boolean sense of its Invert attribute, with the astInvert function for example) will interchange the values of its Base and Current attributes.


next up previous 264
Next: Border - Draw a border around valid regions of a Plot?
Up: AST Attribute Descriptions
Previous: AsTime(axis) - Format celestal coordinates as times?

AST A Library for Handling World Coordinate Systems in Astronomy
Starlink User Note 211
R.F. Warren-Smith & D.S. Berry
25th February 2013
E-mail:starlink@jiscmail.ac.uk

Copyright (C) 2014 Science \& Technology Facilities Council