<s>
Evolutionary	B-Algorithm
data	I-Algorithm
mining	I-Algorithm
,	O
or	O
genetic	O
data	B-Application
mining	I-Application
is	O
an	O
umbrella	O
term	O
for	O
any	O
data	B-Application
mining	I-Application
using	O
evolutionary	B-Algorithm
algorithms	I-Algorithm
.	O
</s>
<s>
Evolutionary	B-Algorithm
algorithms	I-Algorithm
for	O
data	B-Application
mining	I-Application
work	O
by	O
creating	O
a	O
series	O
of	O
random	O
rules	O
to	O
be	O
checked	O
against	O
a	O
training	O
dataset	B-General_Concept
.	O
</s>
<s>
The	O
process	O
is	O
iterated	B-Algorithm
many	O
times	O
and	O
eventually	O
,	O
a	O
rule	O
will	O
arise	O
that	O
approaches	O
100%	O
similarity	O
with	O
the	O
training	O
data	O
.	O
</s>
<s>
This	O
rule	O
is	O
then	O
checked	O
against	O
a	O
test	O
dataset	B-General_Concept
,	O
which	O
was	O
previously	O
invisible	O
to	O
the	O
genetic	O
algorithm	O
.	O
</s>
<s>
Before	O
databases	O
can	O
be	O
mined	O
for	O
data	O
using	O
evolutionary	B-Algorithm
algorithms	I-Algorithm
,	O
it	O
first	O
has	O
to	O
be	O
cleaned	O
,	O
which	O
means	O
incomplete	O
,	O
noisy	O
or	O
inconsistent	O
data	O
should	O
be	O
repaired	O
.	O
</s>
<s>
When	O
dealing	O
with	O
large	O
datasets	B-General_Concept
,	O
it	O
might	O
be	O
beneficial	O
to	O
also	O
reduce	O
the	O
amount	O
of	O
data	O
being	O
handled	O
.	O
</s>
<s>
At	O
this	O
point	O
,	O
the	O
data	O
is	O
split	O
into	O
two	O
equal	O
but	O
mutually	O
exclusive	O
elements	O
,	O
a	O
test	O
and	O
a	O
training	O
dataset	B-General_Concept
.	O
</s>
<s>
The	O
training	O
dataset	B-General_Concept
will	O
be	O
used	O
to	O
let	O
rules	O
evolve	O
which	O
match	O
it	O
closely	O
.	O
</s>
<s>
The	O
test	O
dataset	B-General_Concept
will	O
then	O
either	O
confirm	O
or	O
deny	O
these	O
rules	O
.	O
</s>
<s>
Evolutionary	B-Algorithm
algorithms	I-Algorithm
work	O
by	O
trying	O
to	O
emulate	O
natural	O
evolution	O
.	O
</s>
<s>
First	O
,	O
a	O
random	O
series	O
of	O
"	O
rules	O
"	O
are	O
set	O
on	O
the	O
training	O
dataset	B-General_Concept
,	O
which	O
try	O
to	O
generalize	O
the	O
data	O
into	O
formulas	O
.	O
</s>
<s>
This	O
process	O
iterates	B-Algorithm
as	O
necessary	O
in	O
order	O
to	O
produce	O
a	O
rule	O
that	O
matches	O
the	O
dataset	B-General_Concept
as	O
closely	O
as	O
possible	O
.	O
</s>
<s>
When	O
this	O
rule	O
is	O
obtained	O
,	O
it	O
is	O
then	O
checked	O
against	O
the	O
test	O
dataset	B-General_Concept
.	O
</s>
