<s>
The	O
BFR	B-Algorithm
algorithm	I-Algorithm
,	O
named	O
after	O
its	O
inventors	O
Bradley	O
,	O
Fayyad	O
and	O
Reina	O
,	O
is	O
a	O
variant	O
of	O
k-means	B-Algorithm
algorithm	I-Algorithm
that	O
is	O
designed	O
to	O
cluster	O
data	O
in	O
a	O
high-dimensional	O
Euclidean	O
space	O
.	O
</s>
<s>
The	O
mean	O
and	O
standard	B-General_Concept
deviation	I-General_Concept
for	O
a	O
cluster	O
may	O
differ	O
for	O
different	O
dimensions	O
,	O
but	O
the	O
dimensions	O
must	O
be	O
independent	O
.	O
</s>
