When you brush or select in a scatterplot matrix you are looking at
the interaction of a set of separate scatterplots14. You can construct your own
set of interacting plots by choosing the Link
View option from the menus of the plots you want to link. For example,
using the data from Exercise 1 in Section
we can
put "2D ethanol and "2D oxygen in a scatterplot and
"2D sugar in a histogram. If we link these two plots then
selecting one of the two sugar groups in the histogram highlights the
corresponding points in the scatterplot, as shown in Figure
.
Figure:
Scatterplot and histogram with points from one sugar group
highlighted.
 |
If you want to be able to select the points with particular labels
you can use the "2D name-list function to generate a window with a
list of names in it. This window can be linked with any plot, and
selecting a name in a name list will then highlight the
corresponding points in the linked plots. You can use the
"2D name-list function with a numerical argument;
e. g.
(name-list 10)
will generate a list with the names ``0'' , ..., ``9'', or
you can give it a list of case labels of your own.