User Manual

8-10 DRAW Instructions
8308DRAW.DOC TI-83 international English Bob Fedorisko Revised: 02/19/01 12:29 PM Printed: 02/19/01 1:49
PM Page 10 of 20
To shade an area on a graph, select 7:Shade( from the
DRAW
menu. The instruction is pasted to the home screen
or to the program editor.
Shade( 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.
Xleft
and
Xright
, if included, specify left and right
boundaries for the shading.
Xleft
and
Xright
must be
numbers between
Xmin and Xmax, which are the defaults.
pattern
specifies one of four shading patterns.
pattern=
1 vertical (default)
pattern=
2 horizontal
pattern=
3 negative—slope 45
¡
pattern=
4 positive—slope 45
¡
patres
specifies one of eight shading resolutions.
patres=
1 shades every pixel (default)
patres=
2 shades every second pixel
patres
=
3 shades every third pixel
patres
=
4 shades every fourth pixel
patres
=
5 shades every fifth pixel
patres
=
6 shades every sixth pixel
patres
=
7 shades every seventh pixel
patres
=
8 shades every eighth pixel
Shade(
lowerfunc
,
upperfunc
[
,
Xleft
,
Xright
,
pattern
,
patres
]
)
Shading Areas on a Graph
Shading a Graph