Operation Manual

8-8
DRAW
Operations
8208DRAW.DOC TI-82, Chapter 8, English Bob Fedorisko Revised: 02/09/01 12:23 PM Printed:
02/09/01 3:30 PM Page 8 of 16
Shading Areas on a Graph
Shade( shades the area on a graph that is both below one specified function and
above another, between two X values. The instruction must be entered on the
Home screen or in the program editor.
Shading a Graph
Shade(
(
DRAW DRAW
item
7
) is not an interactive operation. It draws
lowerfunc
and
upperfunc
in terms of
X
on the current graph and shades the
area that is specifically above
lowerfunc
and below
upperfunc
. Only the
areas where
lowerfunc
<
upperfunc
are shaded.
You can specify the shading
resolution
(an integer between 1 and 9). If
none is specified, 1 is used.
resolution
=1 shades every pixel.
resolution
=2
shades every second pixel.
resolution
=3 shades every third pixel, and so
on.
Optionally, you can specify
Xleft
(the left boundary) and
Xright
(the right
boundary) for the shaded area. If
Xleft
or
Xright
are not specified,
Xmin
and
Xmax
are used.
Shade(
lowerfunc
,
upperfunc
)
Shade(
lowerfunc
,
upperfunc
,
resolution
)
Shade(
lowerfunc
,
upperfunc
,
resolution
,
Xleft
)
Shade(
lowerfunc
,
upperfunc
,
resolution
,
Xleft
,
Xright
)
For example,
Shade(X
3
–8X,X–2):Shade(X–2,X
3
–8X,2,-2,5)
displays: