Texas Instruments TI-80, Руководство пользователя

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Draw Operations 7-7
There are three shading instructions on the DRAW DRAW menu: SHADE_Y>,
SHADE_Y<, and SHADE(. These instructions are not interactive; they must be
entered on the Home screen or in the program editor.
SHADE_Y>
(
DRAW DRAW,
item 6) takes up to four
arguments (functions of
X
).
SHADE_Y> function
SHADE_Y> function1 , . . . , function4
When executed, SHADE_Y> plots the specified function(s) on
the graph and shades the area above the function with a
pattern.
The patterns for shading are automatically assigned in the
following order.
Function 1 Vertical pattern.
Function 2 Diagonal pattern, lower left to upper right.
Function 3 Diagonal pattern, upper left to lower right.
Function 4 Horizontal pattern.
When you specify multiple functions, the shading is done
sequentially.
Shading Areas on a Graph
Shading Areas
above a Function