<s>
Waikato	O
Environment	O
for	O
Knowledge	O
Analysis	O
(	O
Weka	B-Language
)	O
,	O
developed	O
at	O
the	O
University	O
of	O
Waikato	O
,	O
New	O
Zealand	O
,	O
is	O
free	B-Application
software	I-Application
licensed	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
,	O
and	O
the	O
companion	O
software	O
to	O
the	O
book	O
"	O
Data	B-Application
Mining	I-Application
:	O
Practical	O
Machine	O
Learning	O
Tools	O
and	O
Techniques	O
"	O
.	O
</s>
<s>
Weka	B-Language
contains	O
a	O
collection	O
of	O
visualization	B-Application
tools	O
and	O
algorithms	O
for	O
data	B-General_Concept
analysis	I-General_Concept
and	O
predictive	B-General_Concept
modeling	I-General_Concept
,	O
together	O
with	O
graphical	O
user	O
interfaces	O
for	O
easy	O
access	O
to	O
these	O
functions	O
.	O
</s>
<s>
The	O
original	O
non-Java	O
version	O
of	O
Weka	B-Language
was	O
a	O
Tcl/Tk	B-Application
front-end	O
to	O
(	O
mostly	O
third-party	O
)	O
modeling	O
algorithms	O
implemented	O
in	O
other	O
programming	O
languages	O
,	O
plus	O
data	B-General_Concept
preprocessing	I-General_Concept
utilities	O
in	O
C	B-Language
,	O
and	O
a	O
makefile-based	O
system	O
for	O
running	O
machine	O
learning	O
experiments	O
.	O
</s>
<s>
This	O
original	O
version	O
was	O
primarily	O
designed	O
as	O
a	O
tool	O
for	O
analyzing	O
data	O
from	O
agricultural	O
domains	O
,	O
but	O
the	O
more	O
recent	O
fully	O
Java-based	O
version	O
(	O
Weka	B-Language
3	O
)	O
,	O
for	O
which	O
development	O
started	O
in	O
1997	O
,	O
is	O
now	O
used	O
in	O
many	O
different	O
application	O
areas	O
,	O
in	O
particular	O
for	O
educational	O
purposes	O
and	O
research	O
.	O
</s>
<s>
Advantages	O
of	O
Weka	B-Language
include	O
:	O
</s>
<s>
Free	O
availability	O
under	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
.	O
</s>
<s>
Portability	O
,	O
since	O
it	O
is	O
fully	O
implemented	O
in	O
the	O
Java	B-Language
programming	I-Language
language	I-Language
and	O
thus	O
runs	O
on	O
almost	O
any	O
modern	O
computing	O
platform	O
.	O
</s>
<s>
A	O
comprehensive	O
collection	O
of	O
data	B-General_Concept
preprocessing	I-General_Concept
and	O
modeling	O
techniques	O
.	O
</s>
<s>
Weka	B-Language
supports	O
several	O
standard	O
data	B-Application
mining	I-Application
tasks	O
,	O
more	O
specifically	O
,	O
data	B-General_Concept
preprocessing	I-General_Concept
,	O
clustering	B-Algorithm
,	O
classification	B-General_Concept
,	O
regression	O
,	O
visualization	B-Application
,	O
and	O
feature	B-General_Concept
selection	I-General_Concept
.	O
</s>
<s>
Input	O
to	O
Weka	B-Language
is	O
expected	O
to	O
be	O
formatted	O
according	O
the	O
Attribute-Relational	O
File	O
Format	O
and	O
with	O
the	O
filename	O
bearing	O
the	O
extension	O
.	O
</s>
<s>
All	O
of	O
Weka	B-Language
's	O
techniques	O
are	O
predicated	O
on	O
the	O
assumption	O
that	O
the	O
data	O
is	O
available	O
as	O
one	O
flat	O
file	O
or	O
relation	O
,	O
where	O
each	O
data	O
point	O
is	O
described	O
by	O
a	O
fixed	O
number	O
of	O
attributes	O
(	O
normally	O
,	O
numeric	O
or	O
nominal	O
attributes	O
,	O
but	O
some	O
other	O
attribute	O
types	O
are	O
also	O
supported	O
)	O
.	O
</s>
<s>
Weka	B-Language
provides	O
access	O
to	O
SQL	B-Language
databases	I-Language
using	O
Java	B-Language
Database	I-Language
Connectivity	I-Language
and	O
can	O
process	O
the	O
result	O
returned	O
by	O
a	O
database	O
query	O
.	O
</s>
<s>
Weka	B-Language
provides	O
access	O
to	O
deep	B-Algorithm
learning	I-Algorithm
with	O
Deeplearning4j	B-Library
.	O
</s>
<s>
It	O
is	O
not	O
capable	O
of	O
multi-relational	O
data	B-Application
mining	I-Application
,	O
but	O
there	O
is	O
separate	O
software	O
for	O
converting	O
a	O
collection	O
of	O
linked	O
database	O
tables	O
into	O
a	O
single	O
table	O
that	O
is	O
suitable	O
for	O
processing	O
using	O
Weka	B-Language
.	O
</s>
<s>
Another	O
important	O
area	O
that	O
is	O
currently	O
not	O
covered	O
by	O
the	O
algorithms	O
included	O
in	O
the	O
Weka	B-Language
distribution	O
is	O
sequence	O
modeling	O
.	O
</s>
<s>
Some	O
functionality	O
that	O
used	O
to	O
be	O
included	O
with	O
Weka	B-Language
prior	O
to	O
this	O
version	O
has	O
since	O
been	O
moved	O
into	O
such	O
extension	O
packages	O
,	O
but	O
this	O
change	O
also	O
makes	O
it	O
easier	O
for	O
others	O
to	O
contribute	O
extensions	O
to	O
Weka	B-Language
and	O
to	O
maintain	O
the	O
software	O
,	O
as	O
this	O
modular	O
architecture	O
allows	O
independent	O
updates	O
of	O
the	O
Weka	B-Language
core	O
and	O
individual	O
extensions	O
.	O
</s>
<s>
In	O
1993	O
,	O
the	O
University	O
of	O
Waikato	O
in	O
New	O
Zealand	O
began	O
development	O
of	O
the	O
original	O
version	O
of	O
Weka	B-Language
,	O
which	O
became	O
a	O
mix	O
of	O
Tcl/Tk	B-Application
,	O
C	B-Language
,	O
and	O
makefiles	O
.	O
</s>
<s>
In	O
1997	O
,	O
the	O
decision	O
was	O
made	O
to	O
redevelop	O
Weka	B-Language
from	O
scratch	O
in	O
Java	B-Language
,	O
including	O
implementations	O
of	O
modeling	O
algorithms	O
.	O
</s>
<s>
In	O
2005	O
,	O
Weka	B-Language
received	O
the	O
SIGKDD	B-Operating_System
Data	B-Application
Mining	I-Application
and	O
Knowledge	O
Discovery	O
Service	O
Award	O
.	O
</s>
<s>
In	O
2006	O
,	O
Pentaho	B-Application
Corporation	O
acquired	O
an	O
exclusive	O
licence	O
to	O
use	O
Weka	B-Language
for	O
business	B-General_Concept
intelligence	I-General_Concept
.	O
</s>
<s>
It	O
forms	O
the	O
data	B-Application
mining	I-Application
and	O
predictive	B-General_Concept
analytics	I-General_Concept
component	O
of	O
the	O
Pentaho	B-Application
business	B-General_Concept
intelligence	I-General_Concept
suite	O
.	O
</s>
<s>
Pentaho	B-Application
has	O
since	O
been	O
acquired	O
by	O
Hitachi	O
Vantara	O
,	O
and	O
Weka	B-Language
now	O
underpins	O
the	O
PMI	O
(	O
Plugin	O
for	O
Machine	O
Intelligence	O
)	O
open	O
source	O
component	O
.	O
</s>
<s>
Auto-WEKA	O
is	O
an	O
automated	B-General_Concept
machine	I-General_Concept
learning	I-General_Concept
system	O
for	O
Weka	B-Language
.	O
</s>
<s>
Environment	B-Language
for	I-Language
DeveLoping	I-Language
KDD-Applications	I-Language
Supported	I-Language
by	I-Language
Index-Structures	I-Language
(	O
ELKI	B-Language
)	O
is	O
a	O
similar	O
project	O
to	O
Weka	B-Language
with	O
a	O
focus	O
on	O
cluster	B-Algorithm
analysis	I-Algorithm
,	O
i.e.	O
,	O
unsupervised	O
methods	O
.	O
</s>
<s>
KNIME	B-Language
is	O
a	O
machine	O
learning	O
and	O
data	B-Application
mining	I-Application
software	O
implemented	O
in	O
Java	B-Language
.	O
</s>
<s>
Massive	B-Language
Online	I-Language
Analysis	I-Language
(	O
MOA	B-Language
)	O
is	O
an	O
open-source	O
project	O
for	O
large	O
scale	O
mining	O
of	O
data	O
streams	O
,	O
also	O
developed	O
at	O
the	O
University	O
of	O
Waikato	O
in	O
New	O
Zealand	O
.	O
</s>
<s>
Neural	B-Language
Designer	I-Language
is	O
a	O
data	B-Application
mining	I-Application
software	O
based	O
on	O
deep	B-Algorithm
learning	I-Algorithm
techniques	O
written	O
in	O
C++	B-Language
.	O
</s>
<s>
Orange	B-Application
is	O
a	O
similar	O
open-source	O
project	O
for	O
data	B-Application
mining	I-Application
,	O
machine	O
learning	O
and	O
visualization	B-Application
based	O
on	O
scikit-learn	B-Application
.	O
</s>
<s>
RapidMiner	B-Algorithm
is	O
a	O
commercial	O
machine	O
learning	O
framework	O
implemented	O
in	O
Java	B-Language
which	O
integrates	O
Weka	B-Language
.	O
</s>
<s>
scikit-learn	B-Application
is	O
a	O
popular	O
machine	O
learning	O
library	O
in	O
Python	O
.	O
</s>
