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Token size: 1 byte

Syntax: Shade(lower_equation,upper equation[,left_x_limit,right_x_limit[,pattern,pixel_frequency]])

Shades in an area between two equations.


The area between lower_equation and upper_equation is shaded on the graph screen. The width can be specified with left_x_limit and right_x_limit. pattern and pixel_frequency can also be supplied to control the pattern used for shading.

Patterns are:

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


  • If left_x_limit and right_x_limit are left out, the entire area on the screen between the equations is filled
  • Both equations are drawn on the graph screen along with the shading
  • ERR:DOMAIN if pattern isn't a valid pattern number or pixel_frequency is too large
  • If pattern and pixel_frequency are left out, the area will be filled with solid black


To make a sort of Star Trek: Voyager logo: