1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% GLE - Graphics Layout Engine <http://glx.sourceforge.io/> %
% %
% Modified BSD License %
% %
% Copyright (C) 2009 GLE. %
% %
% Redistribution and use in source and binary forms, with or without %
% modification, are permitted provided that the following conditions %
% are met: %
% %
% 1. Redistributions of source code must retain the above copyright %
% notice, this list of conditions and the following disclaimer. %
% %
% 2. Redistributions in binary form must reproduce the above %
% copyright notice, this list of conditions and the following %
% disclaimer in the documentation and/or other materials provided with %
% the distribution. %
% %
% 3. The name of the author may not be used to endorse or promote %
% products derived from this software without specific prior written %
% permission. %
% %
% THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR %
% IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED %
% WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE %
% ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY %
% DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL %
% DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE %
% GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS %
% INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER %
% IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR %
% OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN %
% IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
\section{Letz} \label{letz:sec}
LETZ generates a data file of z values given an expression in terms of x and y.
\begin{verbatim}
begin letz
data "jack.z"
z = x+sin(y^2)/pi+10.22
x from 0 to 30 step 1
y from 0 to 20 step 1
end letz
\end{verbatim}
The file jack.z now contains the required data. The resulting file can be used to generate surface plots with the begin/end surface block discussed in the previous section.
|
