Creates three-dimensional surface plots using values of three
numeric variables from the input data set.
| Requirements: |
Exactly one plot request
is required.
|
| Global statements: |
FOOTNOTE, TITLE
|
The
PLOT statement specifies one plot request that identifies the three numeric
variables to plot. This statement automatically
- scales the axes to include the maximum and minimum
values for each of the plotted variables x, y, and z
- divides the value range for each variable into
three even intervals, which are represented by four major tick marks on the
axis
- rotates the x-y plane 70° around
the z axis and tilts it 70° toward you, labeling each axis
with the name of the plotted variable or an associated label
- colors the plot with colors that are defined in
the current colors list: axis labels and tick mark labels display in the first
color from the list, axes display in the second color, the top of the surface
plot displays in the third color, and the bottom of the surface plot (if visible)
displays in the fourth color.
You can use statement options to modify any of the three
plot axes as well as the general appearance of the graph, control the viewing
angle, and specify characteristics for reference lines.
In addition, you can use global statements to add text
to the graph, and an Annotate data set to enhance the plot.
|
PLOT plot-request
</option(s)>;
|
plot-request must be
option(s) can be one or more options from
any or all of the following categories:
- y*x=z
- specifies three numeric variables from the
input data set:
- y
- is one of the variables that is plotted
on the horizontal (x-y) plane.
- x
- is another of the variables that is plotted
on the horizontal (x-y) plane.
- z
- is the variable that is plotted on the vertical
(z) axis.
Options in a PLOT statement affect all
graphs
that are produced by that statement. You can specify as many options as you
want and list them in any order.
-
ANNOTATE=Annotate-data-set
ANNO=Annotate-data-set
- specifies a data set to annotate plots that
are produced by the PLOT statement.
-
CAXIS=axis-color
- specifies a color for axis lines and tick
marks. By default, axes are displayed in the second color in the current
colors list.
-
CBOTTOM=bottom-surface-color
- specifies a color for the bottom of the
plot surface. By default, the bottom surface is displayed in the fourth color
in the current colors list.
-
CTEXT=text-color
- specifies a color for all text on the axes,
including tick mark values and axis labels. If you omit this option, a color
specification is searched for in this order:
- the CTEXT= option in a GOPTIONS statement
- the default, the
first color in the colors list.
-
CTOP=top-surface-color
- specifies a color for the top of the plot
surface. By default, the top surface is displayed in the third color in the
current colors list.
-
DESCRIPTION='entry-description'
DES='entry-description'
- specifies the description of the catalog
entry for the chart. The maximum length for entry-description
is 240 characters. The description does not appear on the chart. By default,
the procedure assigns a description of the form PLOT OF y*x=z,
where y*x=z is the request that is specified in the PLOT statement.
-
GRID
- draws reference lines at the major tick
marks on all axes.
-
NAME='entry-name'
- specifies the name of the catalog entry
for the graph. The maximum length for entry-name is 8 characters.
The default name is G3D. If the specified name duplicates the name of an existing
entry, SAS/GRAPH
software adds a number to the duplicate name to create a unique entry, for
example, G3D1.
-
NOAXIS
NOAXES
- specifies that a plot have no axes, axis
labels, or tick mark values.
-
NOLABEL
- specifies that a plot have no axis labels
or tick mark values. Use this option if you want to generate axis labels
and tick mark values with an Annotate data set.
-
ROTATE=angle-list
- specifies one or more angles at which to
rotate the x-y plane about the perpendicular z axis.
The units for angle-list are degrees. By default, ROTATE=70. Angle-list is either an explicit list of values, or a starting and
an ending value with an interval increment, or a combination of both forms:
| n <...n> |
| n TO n <BY
increment> |
| n <...n> TO n <BY increment > <n <...n>
> |
The values specified in angle-list can
be negative or positive and can be larger than 360°. For example, a rotation
angle of 45° can also be expressed as
rotate=405
rotate=-315
You can specify a sequence of angles to produce separate
graphs for each angle. The angles that are specified in the ROTATE= option
are paired with any angles that are specified with the TILT= option. If one
option contains fewer values than the other, the last value in the shorter
list is paired with the remaining values in the longer list.
- SIDE
- produces a surface graph with a side wall.
- TILT=angle-list
- specifies one or more angles at which to
tilt the graph toward you. The units for angle-list are degrees.
By default, TILT=70. Angle-list is either an explicit list of
values, or a starting and an ending value with an interval increment, or a
combination of both forms:
| n <...n> |
| n TO n <BY
increment> |
| n <...n> TO n <BY increment > <n <...n>
> |
The values that are specified in angle-list
must be 0 through 90.
You can specify a sequence of angles to produce separate
graphs for each angle. The angles that are specified in the TILT= option
are paired with any angles that are specified with the ROTATE= option. If
one option contains fewer values than the other, the last value in the shorter
list is paired with the remaining values in the longer list.
-
XTICKNUM=number-of-ticks
YTICKNUM=number-of-ticks
ZTICKNUM=number-of-ticks
- specify the number of major tick marks that
are located on a plot's x, y, or z
axis, respectively. The value for n must be 2 or greater. By
default, XTICKNUM=4, YTICKNUM=4, and ZTICKNUM=4.
-
XYTYPE=1 | 2 | 3
- specifies the direction of lines that are
used to represent the surface. XYTYPE=1 displays the surface by using lines
that represent y axis values. That is, it only draws lines that
are parallel to the x axis. XYTYPE=2 displays the surface by
using lines that represent x axis values, and draws only lines
that are parallel to the y axis. XYTYPE=3 displays the surface
by using lines that represent values for both the x and y axes, and creates a fishnet-like surface. By default, XYTYPE=3.
See Surface Appearance for Different XYTYPE= Values
for an example of the effect of XYTYPE= on the appearance of the surface.
-
ZMAX=max-value
ZMIN=min-value
- specify the maximum and minimum values that
are displayed on a plot's z axis. By default, the z
axis is defined by the minimum and maximum z values that are
in the data set. You can use the ZMIN= and ZMAX= options to extend the z axis beyond this range. The value specified by ZMAX= must be greater
than that specified by ZMIN=.
If you specify a ZMAX= or ZMIN= value within the actual
range of the z variable values, the plot's data values are clipped
at the specified level. For example, if the minimum z value
in the data set is 0 and you specify ZMIN=1, the values of z
that are less than 1 will be plotted as if they are 1.
Use the XYTYPE=
option to change the appearance of the plot surface. This option lets you
select the direction of the lines that form the surface plot. Surface Appearance for Different XYTYPE= Values shows examples of each type
of plot surface.
Surface Appearance for Different XYTYPE= Values
![[IMAGE]](./images/01329372.gif)
Copyright 1999 by SAS Institute Inc., Cary, NC, USA. All rights reserved.
