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Chapter 2 Graphics Tutorial

2-14

If the character resulting for section x of any row is @ (indicating that all bits in that sec-

tion are white), then that character may be omitted. If sections x and y are both @, then

both characters may be omitted. However, if the result for section y is @ and that for sec-

tion x is a character other than @, then no characters may be omitted. In terms of the pro-

gram example above, what this means is that the bit map string,

@X0@ | 0Af0CC0FA8L@<X@6p@3p@3X@6L@<FA8CC0Af0@ | 0@X0;

may be shortened by four characters to:

X0 | 0Af0CC0FA8L@<X@6p@3p@3X@6L@<FA8CC0Af0 | 0X0;

Patterns defined by the XPAT command remain effective until they are redefined by

another XPAT command, or until the printing system is turned off.

Drawing Pie Charts

The standard graphics mode provides a convenient function for drawing pie charts. See

the following example:

!R! RES; UNIT C; SPD .05;

MZP 10, 10;

PIE 2, 0, 10, 20, 30, 40;

PAGE;

EXIT;

Column value

0+64=64 (@) 24+64=88 (X) 0+48=48 (0)

0+64=64 (@) 60+64=124 (|) 0+48=48 (0)

1+64=65 (A) 38+64=102 (f) 0+48=48 (0)

3+64=67 (C) 3+64=67 (C) 0+48=48 (0)

6+64=70 (F) 1+64=65 (A) 8+48=56 (8)

12+64=76 (L) 0+64=64 (@) 12+48=60 (<)

24+64=88 (X) 0+64=64 (@) 6+48=54 (6)

48+64=112 (p) 0+64=64 (@) 3+48=51 (3)