Graphics Reference
In-Depth Information
tion coe
cient forasinglevariable. hisallowsustoexploretheneighborhoodof
aninterestingfeatureortounderstandtheimportanceofavariableonthefeature.
Some Basics on Projections
2.1.1
What is a projection? We can think of a projection as the shadow of an object. Espe-
cially if it is a
-Dprojection, then the projection is the shadow the object casts under
a bright light (Fig.
.
). If the object rotates in the light, we see many different
-D
shadows and we can infer the shape of the object itself.
Figure
.
.
Projections are like shadows. When many projections are viewed, it is possible to obtain
a sense of the shape of a dataset. What may look like a horse in one projection may be revealed as
a carefully oriented pair of hands by another
