<s>
Rexer	O
Analytics	O
’s	O
Annual	O
Data	B-Application
Miner	I-Application
Survey	O
is	O
the	O
largest	O
survey	O
of	O
data	B-Application
mining	I-Application
,	O
data	O
science	O
,	O
and	O
analytics	O
professionals	O
in	O
the	O
industry	O
.	O
</s>
<s>
It	O
consists	O
of	O
approximately	O
50	O
multiple	O
choice	O
and	O
open-ended	O
questions	O
that	O
cover	O
seven	O
general	O
areas	O
of	O
data	B-Application
mining	I-Application
science	O
and	O
practice	O
:	O
(	O
1	O
)	O
Field	O
and	O
goals	O
,	O
(	O
2	O
)	O
Algorithms	O
,	O
(	O
3	O
)	O
Models	O
,	O
(	O
4	O
)	O
Tools	O
(	O
software	O
packages	O
used	O
)	O
,	O
(	O
5	O
)	O
Technology	O
,	O
(	O
6	O
)	O
Challenges	O
,	O
and	O
(	O
7	O
)	O
Future	O
.	O
</s>
<s>
It	O
is	O
conducted	O
as	O
a	O
service	O
(	O
without	O
corporate	O
sponsorship	O
)	O
to	O
the	O
data	B-Application
mining	I-Application
community	O
,	O
and	O
the	O
results	O
are	O
usually	O
announced	O
at	O
the	O
PAW	O
(	O
Predictive	O
Analytics	O
World	O
)	O
conferences	O
and	O
shared	O
via	O
freely	O
available	O
summary	O
reports	O
.	O
</s>
<s>
In	O
the	O
2013	O
survey	O
,	O
1259	O
data	B-Application
miners	I-Application
from	O
75	O
countries	O
participated	O
.	O
</s>
<s>
While	O
the	O
five	O
Data	B-Application
Miner	I-Application
surveys	O
have	O
covered	O
many	O
data	B-Application
mining	I-Application
topics	O
,	O
the	O
three	O
topics	O
that	O
get	O
the	O
most	O
attention	O
in	O
citations	O
and	O
at	O
conference	O
presentations	O
are	O
:	O
</s>
<s>
Algorithms	O
:	O
Each	O
year	O
the	O
surveys	O
have	O
consistently	O
shown	O
that	O
decision	B-Algorithm
trees	I-Algorithm
,	O
regression	O
,	O
and	O
cluster	B-Algorithm
analysis	I-Algorithm
form	O
a	O
triad	O
of	O
core	O
algorithms	O
for	O
most	O
data	B-Application
miners	I-Application
.	O
</s>
<s>
This	O
is	O
consistent	O
with	O
independent	O
polls	O
of	O
data	B-Application
miners	I-Application
conducted	O
by	O
KDnuggets	O
over	O
the	O
years	O
.	O
</s>
<s>
Data	B-Application
Mining	I-Application
Tools	O
:	O
Data	B-Application
miners	I-Application
report	O
using	O
an	O
average	O
of	O
four	O
software	O
tool	B-Algorithm
to	O
conduct	O
their	O
analyses	O
.	O
</s>
<s>
Over	O
the	O
survey	O
years	O
,	O
R	B-Language
has	O
risen	O
in	O
popularity	O
.	O
</s>
<s>
In	O
2010	O
it	O
overtook	O
SPSS	B-Algorithm
Statistics	I-Algorithm
and	O
SAS	B-Language
to	O
become	O
the	O
tool	B-Algorithm
used	O
by	O
the	O
most	O
data	B-Application
miners	I-Application
.	O
</s>
<s>
And	O
the	O
2011	O
survey	O
showed	O
that	O
R	B-Language
is	O
now	O
being	O
used	O
by	O
close	O
to	O
half	O
of	O
all	O
data	B-Application
miners	I-Application
(	O
47%	O
)	O
.	O
</s>
<s>
STATISTICA	B-Application
has	O
also	O
grown	O
in	O
popularity	O
.	O
</s>
<s>
From	O
2007-2009	O
more	O
data	B-Application
miners	I-Application
indicated	O
that	O
SPSS	B-Algorithm
Clementine	I-Algorithm
(	O
now	O
IBM	B-Algorithm
SPSS	I-Algorithm
Modeler	I-Algorithm
)	O
was	O
their	O
primary	O
data	B-Application
mining	I-Application
tool	B-Algorithm
than	O
any	O
other	O
tool	B-Algorithm
.	O
</s>
<s>
However	O
,	O
in	O
2010	O
and	O
2011	O
,	O
STATISTICA	B-Application
was	O
cited	O
most	O
frequently	O
as	O
data	B-Application
miners	I-Application
 '	O
primary	O
tool	B-Algorithm
.	O
</s>
<s>
In	O
terms	O
of	O
satisfaction	O
with	O
their	O
tools	O
,	O
in	O
the	O
past	O
few	O
years	O
,	O
STATISTICA	B-Application
,	O
SPSS	B-Algorithm
Modeler	I-Algorithm
,	O
R	B-Language
,	O
KNIME	B-Language
,	O
RapidMiner	B-Algorithm
and	O
Salford	O
Systems	O
have	O
received	O
the	O
strongest	O
satisfaction	O
ratings	O
from	O
data	B-Application
miners	I-Application
in	O
these	O
surveys	O
.	O
</s>
<s>
The	O
growing	O
popularity	O
of	O
R	B-Language
is	O
consistent	O
with	O
independent	O
polls	O
of	O
data	B-Application
miners	I-Application
conducted	O
by	O
KDnuggets	O
,	O
but	O
the	O
KDnuggets	O
polls	O
show	O
a	O
different	O
picture	O
regarding	O
the	O
popularity	O
of	O
commercial	O
data	B-Application
mining	I-Application
software	O
.	O
</s>
<s>
Robert	O
Muenchen	O
has	O
taken	O
a	O
multi-faceted	O
approach	O
to	O
assessing	O
the	O
popularity	O
of	O
data	O
analysis	O
software	O
-	O
an	O
approach	O
that	O
includes	O
blog	O
post	O
counts	O
,	O
Google	B-Library
Scholar	I-Library
data	O
,	O
listserv	O
subscribers	O
,	O
use	O
in	O
competitions	O
,	O
book	O
publications	O
,	O
Google	B-Algorithm
PageRank	I-Algorithm
,	O
and	O
more	O
.	O
</s>
<s>
His	O
analyses	O
are	O
consistent	O
with	O
the	O
Rexer	O
Analytics	O
Surveys	O
and	O
KDnuggets	O
in	O
outlining	O
the	O
growth	O
of	O
R	B-Language
,	O
but	O
Muenchen	O
illustrates	O
that	O
the	O
popularity	O
of	O
software	O
is	O
more	O
nuanced	O
and	O
one	O
's	O
conclusions	O
will	O
be	O
different	O
depending	O
on	O
what	O
measure	O
of	O
popularity	O
is	O
used	O
.	O
</s>
<s>
The	O
Rexer	O
Analytics	O
survey	O
summary	O
reports	O
include	O
analyses	O
of	O
the	O
data	B-Application
miners	I-Application
 '	O
satisfaction	O
with	O
20	O
dimensions	O
of	O
their	O
software	O
.	O
</s>
<s>
and	O
Nisbet	O
have	O
also	O
produced	O
reviews	O
of	O
data	B-Application
mining	I-Application
software	O
.	O
</s>
<s>
Challenges	O
:	O
Consistently	O
across	O
the	O
years	O
,	O
dirty	O
data	O
,	O
explaining	O
data	B-Application
mining	I-Application
to	O
others	O
,	O
and	O
difficult	O
access	O
to	O
data	O
are	O
the	O
top	O
challenges	O
data	B-Application
miners	I-Application
report	O
facing	O
.	O
</s>
