<s>
PSTricks	B-Language
is	O
a	O
set	O
of	O
macros	O
that	O
allow	O
the	O
inclusion	O
of	O
PostScript	B-Language
drawings	O
directly	O
inside	O
TeX	B-Application
or	O
LaTeX	B-Application
source	O
code	O
.	O
</s>
<s>
Coordinates	O
in	O
PSTricks	B-Language
are	O
always	O
represented	O
in	O
parentheses	O
,	O
as	O
the	O
following	O
example	O
(	O
scaled	O
)	O
illustrates	O
:	O
</s>
<s>
PSTricks	B-Language
commands	O
are	O
low	O
level	O
,	O
so	O
many	O
LaTeX	B-Application
packages	O
have	O
been	O
made	O
in	O
order	O
to	O
ease	O
the	O
creation	O
of	O
several	O
kinds	O
of	O
graphics	O
that	O
are	O
commonly	O
used	O
on	O
mathematical	O
typesetting	O
.	O
</s>
<s>
The	O
previous	O
example	O
also	O
illustrate	O
that	O
TeX	B-Application
commands	O
can	O
be	O
used	O
as	O
elements	O
into	O
the	O
pictures	O
.	O
</s>
<s>
Since	O
PostScript	B-Language
uses	O
RPN	O
style	O
for	O
mathematical	O
operations	O
,	O
the	O
argument	O
to	O
pst-plot	O
must	O
be	O
supplied	O
in	O
the	O
same	O
form	O
.	O
</s>
<s>
pstricks-add	O
extends	O
pst-plot	O
enabling	O
also	O
polar	O
graphs	O
and	O
allowing	O
the	O
use	O
algebraic	O
notation	O
for	O
plots	O
instead	O
of	O
RPN	O
.	O
</s>
<s>
pst-math	O
provides	O
trigonometric	O
functions	O
in	O
radians	O
(	O
since	O
PostScript	B-Language
defaults	O
to	O
using	O
degrees	O
)	O
and	O
hyperbolic	O
trigonometric	O
functions	O
.	O
</s>
<s>
There	O
are	O
many	O
other	O
extensions	O
,	O
for	O
drawing	O
Circuit	B-Application
diagrams	I-Application
,	O
barcodes	O
,	O
graphs	O
,	O
trees	O
,	O
visualizing	O
data	O
,	O
etc	O
.	O
</s>
<s>
PSTricks	B-Language
is	O
only	O
fully	O
compatible	O
with	O
TeX	B-Application
systems	O
using	O
PostScript	B-Language
intermediates	O
,	O
including	O
but	O
not	O
limited	O
to	O
eTeX	O
and	O
others	O
.	O
</s>
<s>
However	O
,	O
it	O
is	O
not	O
compatible	O
with	O
the	O
widely	O
used	O
pdfTeX	B-Language
engine	O
in	O
PDF	B-Application
mode	O
.	O
</s>
<s>
As	O
pdfTeX	B-Language
is	O
the	O
default	O
engine	O
in	O
most	O
current	O
installations	O
,	O
users	O
of	O
PSTricks	B-Language
must	O
either	O
force	O
pdfTeX	B-Language
to	O
DVI	B-Application
mode	O
or	O
use	O
auto-pst-pdf	O
.	O
</s>
<s>
PGF/TikZ	B-Operating_System
is	O
an	O
alternative	O
to	O
PSTricks	B-Language
that	O
is	O
compatible	O
with	O
pdfTeX	B-Language
.	O
</s>
