Graphics Reference
In-Depth Information
Figure
.
.
Instead of a barchart as in Fig.
.
a spine plot is used to portray a different reading
behavior. he share of males first decreases but then increases again for the groups of students who
spend a lot of their spare time reading
that are needed for linked views so that their concept can be used for a successful
exploration of datasets.
Theoretical Structures for Linked Views
8.2
As a general paradigm, linking views means that two or more plots share and ex-
change information with each other. To achieve the exchange of information, a link-
ingprocedureneedstoestablish arelationship between twoormoreplots.Onceare-
lation between two plots has been established, the question is which information is
sharedandhowthesharingofinformation canberealized? Toexplorethewiderange
of possibilities of linking schemes and structures, we use the separation of data dis-
plays in their components as proposed in Wilhelm (
). According to this defini-
tion, a data analysis display
consists of a frame
, a type, and its associated set of
D
F
graphical elements
as well as its set of scale representing axes s
G
,amodel
and
G
X
its scale s
X
,andasamplepopulationΩ,i.e.,
D=(F
,
(G
, s
G
)
,
(X
, s
X
)
,Ω
)
.hepair
((X
is the plotting part.
To effectively put the idea of linked views into practice, a communication scheme
between the plots has to be established. he (external) linking structure controls the
exchange and transfer of information between different plots. In principle, informa-
tion from all plots may be used and combined; in practice it is reasonable to label
one plot “the active plot,” while all other plots are labeled “passive.” his distinc-
tion is analogous to the notions “sender” and “receiver” in communication theory.
he active plot sends a message to all passive plots, which act accordingly. he def-
inition of data displays and the abstract concept of linking opens the possibility of
defining a linking structure as a set of relations among any two components of the
two displays. However, only relations between identical layers of the data displays
are of practical relevance. he diagram in Fig.
.
illustrates the possible linking
schemes between the active display
, s
X
)
,Ω
)
is the data part and
(F
,
(G
, s
G
))
D
=(
Ω
,
X
,
G
,
F
)
and the passive display
D
=(
Ω
,
X
,
G
,
F
)
under this restriction.
