# [pstricks] Some Questions about pst-3dplot

Dougherty, Michael michael.dougherty at swosu.edu
Sun Mar 16 15:54:19 CET 2008

```On #1, there are books about Postscript code.  They are a lot more than you need, but I bought one just to have it.
Postscript Language Reference (Paperback)

# Paperback: 897 pages
# Publisher: Addison-Wesley Professional; 3 Pap/Cdr edition (May 1999)
# Language: English
# ISBN-10: 0201379228
# ISBN-13: 978-0201379228

http://tinyurl.com/yntmdn

There are other books you can find if you search around there.

For x^3 you could also do x dup dup mul mul
or x x x mul mul
I suppose.

Trig functions are in degrees.  For a nice sine curve I usually do
{x 180 mul 3.1415926535 div sin}
for instance.  There is probably an easier way, but it works.

There are a few other technicalities but they are easy to discover.

Nice work.  Good luck.

--Mike D.

-----Original Message-----
From: pstricks-bounces at tug.org on behalf of VAFA KHALIGHI
Sent: Fri 3/14/2008 5:38 AM
To: pstricks at tug.org; Herbert.Voss at FU-Berlin.DE
Subject: [pstricks] Some Questions about pst-3dplot

1- Is there any guide where I can learn post script notation for
mathematical expressions well? i.e *x^3* is written as *x 3 exp* in
postscript notation.

2- When you want to skech a function of two variables, do you really need to
have
**
*\psset{Alpha=25,Beta=15}*
and what happenes if you do not put it? will you get the wrong graph?

3- How do you know which valuve of Alpha and Beta you need to use?

I attach my current assignment  solution here as a pdf file and I sketched
the two functions of two variables by without calling Alpha and Beta.

Can you please look at the graphs in my file and say I am on the right track
or not?

Thanks

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