<s>
In	O
statistics	O
,	O
multiple	B-Algorithm
correspondence	I-Algorithm
analysis	I-Algorithm
(	O
MCA	O
)	O
is	O
a	O
data	B-General_Concept
analysis	I-General_Concept
technique	O
for	O
nominal	O
categorical	O
data	O
,	O
used	O
to	O
detect	O
and	O
represent	O
underlying	O
structures	O
in	O
a	O
data	O
set	O
.	O
</s>
<s>
The	O
procedure	O
thus	O
appears	O
to	O
be	O
the	O
counterpart	O
of	O
principal	B-Application
component	I-Application
analysis	I-Application
for	O
categorical	O
data	O
.	O
</s>
<s>
MCA	O
can	O
be	O
viewed	O
as	O
an	O
extension	O
of	O
simple	O
correspondence	B-Algorithm
analysis	I-Algorithm
(	O
CA	O
)	O
in	O
that	O
it	O
is	O
applicable	O
to	O
a	O
large	O
set	O
of	O
categorical	O
variables	O
.	O
</s>
<s>
Analyzing	O
the	O
Burt	O
table	O
is	O
a	O
more	O
natural	O
generalization	O
of	O
simple	O
correspondence	B-Algorithm
analysis	I-Algorithm
,	O
and	O
individuals	O
or	O
the	O
means	O
of	O
groups	O
of	O
individuals	O
can	O
be	O
added	O
as	O
supplementary	O
points	O
to	O
the	O
graphical	O
display	O
.	O
</s>
<s>
As	O
in	O
factor	O
analysis	O
or	O
principal	B-Application
component	I-Application
analysis	I-Application
,	O
the	O
first	O
axis	O
is	O
the	O
most	O
important	O
dimension	O
,	O
the	O
second	O
axis	O
the	O
second	O
most	O
important	O
,	O
and	O
so	O
on	O
,	O
in	O
terms	O
of	O
the	O
amount	O
of	O
variance	O
accounted	O
for	O
.	O
</s>
<s>
In	O
recent	O
years	O
,	O
several	O
students	O
of	O
Jean-Paul	O
Benzécri	O
have	O
refined	O
MCA	O
and	O
incorporated	O
it	O
into	O
a	O
more	O
general	O
framework	O
of	O
data	B-General_Concept
analysis	I-General_Concept
known	O
as	O
geometric	O
data	B-General_Concept
analysis	I-General_Concept
.	O
</s>
<s>
This	O
involves	O
the	O
development	O
of	O
direct	O
connections	O
between	O
simple	O
correspondence	B-Algorithm
analysis	I-Algorithm
,	O
principal	B-Application
component	I-Application
analysis	I-Application
and	O
MCA	O
with	O
a	O
form	O
of	O
cluster	B-Algorithm
analysis	I-Algorithm
known	O
as	O
Euclidean	O
classification	O
.	O
</s>
<s>
This	O
extension	O
is	O
called	O
factor	B-Algorithm
analysis	I-Algorithm
of	I-Algorithm
mixed	I-Algorithm
data	I-Algorithm
(	O
see	O
below	O
)	O
.	O
</s>
<s>
Two	O
methods	O
simultaneously	O
analyze	O
these	O
two	O
types	O
of	O
variables	O
:	O
factor	B-Algorithm
analysis	I-Algorithm
of	I-Algorithm
mixed	I-Algorithm
data	I-Algorithm
and	O
,	O
when	O
the	O
active	O
variables	O
are	O
partitioned	O
in	O
several	O
groups	O
:	O
multiple	O
factor	O
analysis	O
.	O
</s>
<s>
There	O
are	O
numerous	O
software	O
of	O
data	B-General_Concept
analysis	I-General_Concept
that	O
include	O
MCA	O
,	O
such	O
as	O
STATA	O
and	O
SPSS	O
.	O
</s>
