<s>
Emacs	B-Application
Speaks	I-Application
Statistics	I-Application
(	O
ESS	O
)	O
is	O
an	O
Emacs	B-Application
package	O
for	O
programming	O
in	O
statistical	O
languages	O
.	O
</s>
<s>
It	O
adds	O
two	O
types	O
of	O
modes	O
to	O
emacs	B-Application
:	O
</s>
<s>
inferior	O
ESS	O
(	O
iESS	O
)	O
modes	O
for	O
interacting	O
with	O
statistical	O
processes	O
like	O
R	B-Language
and	O
SAS	B-Language
.	O
</s>
<s>
In	O
addition	O
,	O
modes	O
of	O
type	O
(	O
1	O
)	O
provide	O
the	O
capability	O
to	O
submit	O
a	O
batch	O
job	O
for	O
statistical	O
packages	O
like	O
SAS	B-Language
,	O
BUGS	O
or	O
JAGS	B-Application
when	O
an	O
interactive	O
session	O
is	O
unwanted	O
due	O
to	O
the	O
potentially	O
lengthy	O
time	O
required	O
for	O
the	O
task	O
to	O
complete	O
.	O
</s>
<s>
With	O
Emacs	B-Application
Speaks	I-Application
Statistics	I-Application
,	O
the	O
user	O
can	O
conveniently	O
edit	O
statistical	O
language	O
commands	O
in	O
one	O
emacs	B-Application
buffer	O
,	O
and	O
execute	O
the	O
code	O
in	O
a	O
second	O
.	O
</s>
<s>
There	O
are	O
a	O
number	O
of	O
advantages	O
of	O
doing	O
data	O
analysis	O
using	O
Emacs/ESS	O
in	O
this	O
way	O
,	O
rather	O
than	O
interacting	O
with	O
R	B-Language
,	O
S-PLUS	B-Application
or	O
other	O
software	O
directly	O
.	O
</s>
<s>
This	O
also	O
encourages	O
the	O
good	O
practice	O
of	O
keeping	O
a	O
record	O
of	O
one	O
's	O
data	O
analysis	O
,	O
equivalent	O
to	O
working	O
from	O
do-files	O
in	O
Stata	B-Algorithm
.	O
</s>
<s>
Third	O
,	O
since	O
emacs	B-Application
is	O
also	O
an	O
able	O
editor	O
of	O
LaTeX	B-Application
files	O
,	O
it	O
facilitates	O
the	O
integration	O
of	O
data	O
analysis	O
and	O
written	O
text	O
with	O
Sweave	B-Application
.	O
</s>
