G3GRID Procedure
PROC G3GRID Statement
Identifies the input data set. Can also specify
one, or two output data sets.
Requirement: 
An input data set is required. 
Syntax
PROC G3GRID <DATA=inputdataset>
<OUT=outputdataset>
<OUTTRI=outputdataset>;
Optional Arguments
 DATA=inputdataset

specifies the SAS data
set that contains the variables to process. By default, the procedure
uses the most recently created SAS data set.
 OUT=outputdataset

specifies the output
data set. The data set contains any BY variables that you specify,
the interpolated or smoothed values of the vertical variables (z through zn), and the coordinates for
all grid positions on the horizontal (xy) plane. If you specify
smoothing, the output data set also contains a variable named _SMTH_,
whose value is a smoothing parameter. The observations in this data
set are ordered by any variables that you specify with a BY statement.
By default, the output of PROC G3GRID creates WORK.DATA1.
Depending on the shape
of the original data, and the options that you use, the output data
set can contain values for the vertical (
z through
z
n) values that are outside of the range of the
original values in the data set.
 OUTTRI=outputdataset

specifies an additional
output data set that contains triangular coordinates. The data set
will contain any BY variables that you specify, the two horizontal
variables giving the horizontal (x y) plane coordinates of
the input points, and a variable named TRIANGLE that uses the integer
values to label the triangles. The observations in this data set are
ordered by any variables that you specify with a BY statement.
The data set contains
three observations for each value of the variable TRIANGLE. The three
observations give the coordinates of the three vertices of the triangle.
Points on the convex hull of the input data set of points are also
assumed to lie in degenerate triangles, whose other vertices are at
infinity. The points in the convex hull can be recovered by keeping
only those triangles with exactly two missing vertices.
By default, no OUTTRI=
data set is produced. OUTTRI= is not valid when you specify the SPLINE
option in the GRID statement.
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