<s>
A	O
motion	B-Application
chart	I-Application
is	O
a	O
dynamic	O
bubble	B-Application
chart	I-Application
which	O
allows	O
efficient	O
and	O
interactive	O
exploration	O
and	O
visualization	O
of	O
longitudinal	O
multivariate	O
Data	O
.	O
</s>
<s>
Motion	B-Application
charts	I-Application
provide	O
mechanisms	O
for	O
mapping	O
ordinal	O
,	O
nominal	O
and	O
quantitative	O
variables	O
onto	O
time	O
,	O
2D	O
coordinate	O
axes	O
,	O
size	O
,	O
colors	O
,	O
glyphs	O
and	O
appearance	O
characteristics	O
,	O
which	O
facilitate	O
the	O
interactive	O
display	O
of	O
multidimensional	O
and	O
temporal	O
data	O
.	O
</s>
<s>
For	O
instance	O
,	O
Scatter	B-Application
plots	I-Application
require	O
bivariate	O
data	O
.	O
</s>
<s>
Motion	B-Application
charts	I-Application
provide	O
a	O
dynamic	O
data	O
visualization	O
paradigm	O
that	O
facilitates	O
the	O
representation	O
and	O
understanding	O
of	O
large	O
and	O
multivariate	O
data	O
.	O
</s>
<s>
Using	O
the	O
familiar	O
2D	O
Bubble	B-Application
charts	I-Application
,	O
motion	B-Application
Charts	I-Application
enable	O
the	O
display	O
of	O
large	O
multivariate	O
data	O
with	O
thousands	O
of	O
data	O
points	O
and	O
allow	O
for	O
interactive	O
visualization	O
of	O
the	O
data	O
using	O
additional	O
dimensions	O
like	O
time	O
,	O
the	O
size	O
of	O
the	O
blobs	O
,	O
and	O
color	O
)	O
to	O
show	O
different	O
characteristics	O
of	O
the	O
data	O
.	O
</s>
<s>
The	O
central	O
object	O
of	O
a	O
motion	B-Application
chart	I-Application
is	O
a	O
blob	O
(	O
or	O
bubble	O
)	O
,	O
which	O
is	O
a	O
solid	O
object	O
homeomorphic	O
to	O
a	O
disc	O
.	O
</s>
<s>
Using	O
variable	O
mapping	O
,	O
motion	B-Application
charts	I-Application
allow	O
control	O
over	O
the	O
appearance	O
of	O
the	O
blobs	O
at	O
different	O
time	O
points	O
.	O
</s>
<s>
This	O
mechanism	O
enhances	O
the	O
dynamic	O
appearance	O
of	O
the	O
data	O
in	O
the	O
motion	B-Application
chart	I-Application
and	O
facilitates	O
the	O
visual	O
inspection	O
of	O
associations	O
,	O
patterns	O
and	O
trends	O
in	O
multivariate	O
datasets	O
.	O
</s>
<s>
There	O
are	O
several	O
web-based	O
motion	B-Application
charts	I-Application
graphical	O
data	O
visualization	O
tools	O
including	O
Many-Eyes	O
,	O
Gapminder	O
,	O
Google	O
Motion	B-Application
Charts	I-Application
,	O
nanobi	O
analytics	O
,	O
and	O
SOCR	O
Motion	B-Application
Charts	I-Application
.	O
</s>
