Graphics Reference
In-Depth Information
Figure
.
.
Faceting and boxplots. For the
season, the let view shows a histogram of salary on
a log scale. Players earning over $
were selected and are also shown in the linked boxplot,
which shows four major measures of performance: batting average, on-base percentage, home-run rate,
and slugging average
e
ciently than the linked parallel coordinates plot, but, with the exception of Barry
Bonds,whoisanoutlierinallstats,itdoesnotallowustoseeindividuals'statistics
in each category. We have no idea from this chart whether high on-base percentage
implies a high home-run rate. Both parallel coordinates views and multiple boxplots
views are useful, but they facilitate different analytic goals.
Distance-based Linking
9.5
In Sect.
.
we proposed a simplification to the general implementation in which
the degree-of-interest value for each case must be either zero or one. Although this
is the most common implementation, other methods have been proposed that relax
this condition. Oneof particular interest isdistance-based linking. Indistance-based
linking, instead of defining a region of the screen that is used for selection and using
that to define a zero-one variable, a location in the data display is indicated, and the
degree of interest measures how close each item is to that location. We demonstrate
a simple version of it below in Fig.
.
.
Interested by the relationship between body shape (height and weight) and field-
ing position, the analyst creates a chart of the two major fielding statistics and links
it with the height/weight hex-binned scatterplot. Distance linking is used to relate
the two together, with a brightness scale used to map the mean degree of interest in
the binned scatterplot. Players in this cluster with more assists than putouts tend to
be short and light. Other variations on distance-based linking are possible. In this
example, we used the distance between items' graphical representations to define the
distance. An alternative might be to use a distance measure based directly on the
