The Handles form (),
available from the
XYArray Layer Control,
draws a single pointer (a "handle") somewhere near each group of points
defined by pair of X/Y array coordinates.
This doesn't do much to show the shape of the line formed by the
array values, but it does provide a reference point for each line.
This can be used by the parts of TOPCAT that associated a fixed
position with each table row, in particular:
Example Handles plot
Handles form configuration panel
The configuration options are:
index
:
(X,Y) position at a certain fraction of the way through the arrays,
as given by the Fraction value;
Fraction=0.0 is the first element, Fraction=1.0 is the lastymax
:
(X,Y) position at which the maximum Y value is located
(Fraction is ignored)ymin
:
(X,Y) position at which the minimum Y value is located
(Fraction is ignored)xmax
:
(X,Y) position at which the maximum X value is located
(Fraction is ignored)xmin
:
(X,Y) position at which the minimum X value is located
(Fraction is ignored)xymean
:
center of gravity of all the (X,Y) points
(Fraction is ignored)