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Draw Operations 7-9
SHADE(
(
DRAW DRAW
, item 8) shades the area on a graph
that is below one specified function and above another,
between two X values.
SHADE(
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
is 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
)
Shading a Graph