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Description:
This attribute specifies how many digits of precision are required by default
when a coordinate value is formatted for a
Frame axis (e.g. using
astFormat).
Its value may be set either for a Frame as a whole, or (by subscripting the
attribute name with the number of an axis) for each axis individually. Any
value set for an individual axis will over-ride the value for the Frame as a
whole.
Note that the Digits value acts only as a means of determining a default Format string.
Its effects are over-ridden if a Format string is set explicitly for an axis.
However, if the Format attribute specifies the precision using the string "
."
,
then the Digits attribute is used to determine the number of decimal places to
produce.
Type:
Integer. Applicability
Frame
The default Digits value
supplied by the Frame class is 7. If a value less than 1 is supplied, then 1 is
used instead.
The Digits attribute of a FrameSet (or one of its
axes) is the same as that of its current Frame (as specified by the
Current
attribute).
The default Digits value used by the Plot class when
drawing annotated axis labels is the smallest value which results in all adjacent
labels being distinct.
The Digits attribute is ignored when a
TimeFrame formats a value as a date and time string (see the Format attribute).
Copyright (C) 2021 East Asian Observatory
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- AST
A Library for Handling
World
Coordinate Systems
in Astronomy - Next→
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