<s>
gnuplot	B-Application
is	O
a	O
command-line	B-Application
and	O
GUI	B-Application
program	O
that	O
can	O
generate	O
two	O
-	O
and	O
three-dimensional	O
plots	B-Application
of	O
functions	O
,	O
data	O
,	O
and	O
data	B-Algorithm
fits	I-Algorithm
.	O
</s>
<s>
The	O
program	O
runs	O
on	O
all	O
major	O
computers	O
and	O
operating	B-General_Concept
systems	I-General_Concept
(	O
Linux	B-Application
,	O
Unix	B-Application
,	O
Microsoft	B-Application
Windows	I-Application
,	O
macOS	B-Application
,	O
FreeDOS	B-Application
,	O
and	O
many	O
others	O
)	O
.	O
</s>
<s>
Despite	O
its	O
name	O
,	O
this	O
software	O
is	O
not	O
part	O
of	O
the	B-Application
GNU	I-Application
Project	I-Application
.	O
</s>
<s>
gnuplot	B-Application
can	O
produce	O
output	O
directly	O
on	O
screen	O
,	O
or	O
in	O
many	O
formats	O
of	O
graphics	O
files	O
,	O
including	O
Portable	O
Network	O
Graphics	O
(	O
PNG	O
)	O
,	O
Encapsulated	B-Language
PostScript	I-Language
(	O
EPS	B-Language
)	O
,	O
Scalable	B-Application
Vector	I-Application
Graphics	I-Application
(	O
SVG	B-Application
)	O
,	O
JPEG	O
and	O
many	O
others	O
.	O
</s>
<s>
It	O
is	O
also	O
capable	O
of	O
producing	O
LaTeX	B-Application
code	O
that	O
can	O
be	O
included	O
directly	O
in	O
LaTeX	B-Application
documents	O
,	O
making	O
use	O
of	O
LaTeX	B-Application
's	O
fonts	O
and	O
powerful	O
formula	O
notation	O
abilities	O
.	O
</s>
<s>
gnuplot	B-Application
can	O
read	O
data	O
in	O
multiple	O
formats	O
,	O
including	O
ability	O
to	O
read	O
data	O
on	O
the	O
fly	O
generated	O
by	O
other	O
programs	O
(	O
piping	B-Operating_System
)	O
,	O
create	O
multiple	O
plots	B-Application
on	O
one	O
image	O
,	O
do	O
2D	O
,	O
3D	O
,	O
contour	O
plots	B-Application
,	O
parametric	O
equations	O
,	O
supports	O
various	O
linear	O
and	O
non-linear	O
coordinate	O
systems	O
,	O
projections	O
,	O
geographic	O
and	O
time	O
data	O
reading	O
and	O
presentation	O
,	O
box	O
plots	B-Application
of	O
various	O
forms	O
,	O
histograms	O
,	O
labels	O
,	O
and	O
other	O
custom	O
elements	O
on	O
the	O
plot	O
,	O
including	O
shapes	O
,	O
text	O
and	O
images	O
,	O
that	O
can	O
be	O
set	O
manually	O
,	O
computed	O
by	O
script	O
or	O
automatically	O
from	O
input	O
data	O
.	O
</s>
<s>
gnuplot	B-Application
also	O
provides	O
scripting	O
capabilities	O
,	O
looping	O
,	O
functions	O
,	O
text	O
processing	O
,	O
variables	O
,	O
macros	O
,	O
arbitrary	O
pre-processing	O
of	O
input	O
data	O
(	O
usually	O
across	O
columns	O
)	O
,	O
as	O
well	O
ability	O
to	O
perform	O
non-linear	O
multi-dimensional	O
multi-set	O
weighted	O
data	B-Algorithm
fitting	I-Algorithm
(	O
see	O
Curve	B-Algorithm
fitting	I-Algorithm
and	O
Levenberg	B-Algorithm
–	I-Algorithm
Marquardt	I-Algorithm
algorithm	I-Algorithm
)	O
.	O
</s>
<s>
The	O
gnuplot	B-Application
core	O
code	O
is	O
programmed	O
in	O
C	B-Language
.	O
Modular	O
subsystems	O
for	O
output	O
via	O
Qt	B-Language
,	O
wxWidgets	B-Language
,	O
and	O
LaTeX/TikZ/ConTeXt	O
are	O
written	O
in	O
C++	B-Language
and	O
Lua	B-Language
.	O
</s>
<s>
Despite	O
gnuplot	B-Application
's	O
name	O
,	O
it	O
is	O
not	O
named	O
after	O
,	O
part	O
of	O
or	O
related	O
to	O
the	B-Application
GNU	I-Application
Project	I-Application
,	O
nor	O
does	O
it	O
use	O
the	O
GNU	B-License
General	I-License
Public	I-License
License	I-License
.	O
</s>
<s>
It	O
was	O
named	O
as	O
part	O
of	O
a	O
compromise	O
by	O
the	O
original	O
authors	O
,	O
punning	O
on	O
gnu	B-Operating_System
(	O
the	O
animal	O
)	O
and	O
newplot	O
(	O
a	O
planned	O
name	O
that	O
was	O
discarded	O
due	O
to	O
already	O
being	O
used	O
)	O
.	O
</s>
<s>
Official	O
source	O
code	O
to	O
gnuplot	B-Application
is	O
freely	O
redistributable	O
,	O
but	O
modified	O
versions	O
thereof	O
are	O
not	O
.	O
</s>
<s>
The	O
gnuplot	B-Application
license	O
allows	O
instead	O
distribution	O
of	O
patches	O
against	O
official	O
releases	O
,	O
optionally	O
accompanied	O
by	O
officially	O
released	O
source	O
code	O
.	O
</s>
<s>
Contact	O
information	O
must	O
be	O
supplied	O
with	O
derived	O
works	O
for	O
technical	B-General_Concept
support	I-General_Concept
for	O
the	O
modified	O
software	O
.	O
</s>
<s>
Despite	O
this	O
restriction	O
,	O
gnuplot	B-Application
is	O
accepted	O
and	O
used	O
by	O
many	O
GNU	B-Application
packages	I-Application
and	O
is	O
widely	O
included	O
in	O
Linux	B-Application
distributions	I-Application
including	O
the	O
stricter	O
ones	O
such	O
as	O
Debian	O
and	O
Fedora	O
.	O
</s>
<s>
The	O
OSI	O
Open	O
Source	O
Definition	O
and	O
the	O
Debian	B-License
Free	I-License
Software	I-License
Guidelines	I-License
specifically	O
allow	O
for	O
restrictions	O
on	O
distribution	O
of	O
modified	O
source	O
code	O
,	O
given	O
explicit	O
permission	O
to	O
distribute	O
both	O
patches	O
and	O
source	O
code	O
.	O
</s>
<s>
Newer	O
gnuplot	B-Application
modules	O
(	O
e.g.	O
</s>
<s>
Qt	B-Language
,	O
wxWidgets	B-Language
,	O
and	O
cairo	O
drivers	O
)	O
have	O
been	O
contributed	O
under	O
dual-licensing	O
terms	O
,	O
e.g.	O
</s>
<s>
gnuplot	B-Application
+	O
BSD	O
or	O
gnuplot	B-Application
+	O
GPL	B-License
.	O
</s>
<s>
Several	O
third-party	O
programs	O
have	O
graphical	B-Application
user	I-Application
interfaces	I-Application
that	O
can	O
be	O
used	O
to	O
generate	O
graphs	O
using	O
gnuplot	B-Application
as	O
the	O
plotting	B-Application
engine	O
.	O
</s>
<s>
Maxima	B-Language
is	O
a	O
text-based	O
computer	B-General_Concept
algebra	I-General_Concept
system	I-General_Concept
which	O
itself	O
has	O
several	O
third-party	O
GUIs	B-Application
.	O
</s>
<s>
Other	O
programs	O
that	O
use	O
gnuplot	B-Application
include	O
:	O
</s>
<s>
gplot.pl	O
provides	O
a	O
simpler	O
command-line	B-Application
interface	I-Application
.	O
</s>
<s>
gnuplot	B-Application
can	O
be	O
used	O
from	O
various	O
programming	O
languages	O
to	O
graph	O
data	O
,	O
including	O
Perl	B-Language
(	O
via	O
PDL	B-Language
and	O
other	O
CPAN	B-Language
packages	O
)	O
,	O
Python	B-Language
(	O
via	O
,	O
and	O
SageMath	B-Application
)	O
,	O
R	B-Language
via	O
(	O
)	O
,	O
Julia	B-Application
(	O
via	O
)	O
,	O
Java	B-Language
(	O
via	O
and	O
)	O
,	O
Ruby	B-Language
(	O
via	O
)	O
,	O
Ch	B-Language
(	O
via	O
)	O
,	O
Haskell	B-Language
(	O
via	O
)	O
,	O
Fortran	O
95	O
,	O
Smalltalk	B-Application
(	O
Squeak	B-Operating_System
and	O
GNU	B-Application
Smalltalk	I-Application
)	O
and	O
Rust	B-Application
(	O
via	O
)	O
.	O
</s>
<s>
gnuplot	B-Application
also	O
supports	O
piping	B-Operating_System
,	O
which	O
is	O
typical	O
of	O
scripts	O
.	O
</s>
<s>
For	O
script-driven	O
graphics	O
,	O
gnuplot	B-Application
is	O
one	O
of	O
the	O
most	O
popular	O
programs	O
.	O
</s>
<s>
Gnuplot	B-Application
allows	O
the	O
user	O
to	O
display	O
or	O
store	O
plots	B-Application
in	O
several	O
ways	O
:	O
</s>
<s>
In	O
a	O
desktop	O
window	O
(	O
output	O
modes	O
Qt	B-Language
,	O
wxt	O
,	O
X11	O
,	O
aquaterm	O
,	O
win	O
,	O
...	O
)	O
</s>
<s>
Embedded	O
in	O
a	O
web	O
page	O
(	O
output	O
modes	O
SVG	B-Application
,	O
HTML5	O
,	O
PNG	O
,	O
JPEG	O
,	O
animated	O
GIF	O
,	O
...	O
)	O
</s>
<s>
File	O
formats	O
designed	O
for	O
document	O
processing	O
(	O
output	O
modes	O
PostScript	O
,	O
PDF	O
,	O
cgm	O
,	O
emf	O
,	O
LaTeX	B-Application
variants	O
,	O
...	O
)	O
</s>
