Graphics Reference
In-Depth Information
Figure
.
.
he Total panel (lower right)of
SBA ~ API
panel from Fig.
.
is expanded and the key
defining the symbols and colors is displayed. Now that we have seen the detail of Fig.
.
, and we are
able to see most of the features in this single panel (File: hh/csc/code/lumb.s)
Color and shape of plotting characters: we used three contrasting colors for the
three-level factor. We also used three distinct plotting characters for the three-
level factor. his is both redundant - reemphasizing the difference between lev-
els-anddefensive -protecting theinterpretability ofthe graph fromblack-and-
white copying by a reader. We used lighter and darker shades of the same color
todistinguish thetwo-levelfactor
Sex
.hedifferentdarknesseswillusually sur-
vive photocopying into black and white.
he ColorBrewer Web site Brewer (
) gives a discussion on the principles of
colorchoiceandgives aseries ofpalettes fordistinguishing nominalsetsofitems
or sequences of items.
Summary Plot with Legend
6.3.5
Figure
.
isanexpansionofthegrandtotalpanelofFig.
.
withalegendcontrasting
the combinations of pain group and sex. he legend is needed in Fig.
.
because it
does not have the implicit definitions of the individual panels. We chose to label the
legend with level names constructed as the Cartesian product of the names of the
levels of the two defining factors.
