83Plus:Basic:Graphics:Shade(

Synopsis

Token size: 1 byte

Syntax: Shade(lower equation,upper equation[,left side of X to shade from,right side of X to shade to[,pattern,pixel frequency]])

Shades in an area defined by the two equations, with a pattern at a certain pixel frequency.

Patterns are:

• 1: vertical
• 2: horizontal
• 3: slanted (top left to bottem right)
• 4: slanted (bottem left to top left)

Outputs:

Shaded in area on the graph screen

Comments

• Pattern may only be 1-4
• Pixel will not throw an ERR:DOMAIN

Examples

To make a sort of Star Trek: Voyager logo:

:Shade(−X^2-2,−X^2+7,−10,10,3,2