Appendix 1. Valid function parser strings.
The function parser accepts the following characters / character strings.
variables: x, y, z, u, v, i
constants: a1, a2, a3, a4, a5, a6, a7, a8, a9, pi, ran, n
operators: (  )  **  *  /  +  -
functions: abs, sqrt, exp, log, log10, sin, cos, tan, asin, acos, atan, int


Appendix 2. Symbol table.

0 = (null)
1 = .
2 = +
3 = *
4 = circle (open)
5 = square (open)
6 = triang (open)
7 = star (open)
8 = circle (fill)
9 = square (fill)
10 = triang (fill)
11 = star (fill)
12 = user defined
13 = user defined
14 = user defined
15 = user defined

         Appendix 3. Line-style table.

0 = no line drawn
1 = solid line
2 = dashed line
3 = dot-dash-dot-dash
4 = dotted line
5 = dash-dot-dot-dot
6 = shade beneath function (down to origin)
7 = shade within a curve









Appendix 4. Default color table.

Index 100's Color

0

-

 background [white/black]

1

000

 pen [black/white]

2

100

 red

3

200

 green

4

300

 blue

5

400

 aqua (green+blue)

6

500

 fucsia (red+blue)

7

600

 yellow (red+green)

8

700

 orange (red+yellow)

9

800

 pale green (green+yellow)

10

900

 pale teal (green+aqua)

11

1000

 pale blue (blue+aqua)

12

1100

 purple (blue+fucsia)

13

1200

 heliotrope (red+fucsia)

14

1300

 dark gray

15

1400

 pale gray

16

1500

 undefined

...

...

 undefined

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