The following statements are available in the KRIGE2D procedure:
PROC KRIGE2D options;
BY variables;
COORDINATES | COORD coordinate-variables;
GRID grid-options;
ID variable;
PREDICT | PRED | P predict-options;
MODEL model-options;
RESTORE restore-options;
The PREDICT and MODEL statements are hierarchical; the PREDICT statement is followed by a MODEL statement. If more than one MODEL statement is given, only the last one is used for the analysis. The MODEL statement following a PREDICT statement uses the variable and neighborhood specifications in that PREDICT statement.
You must specify at least one PREDICT statement and one MODEL statement. You must supply a single COORDINATES statement to identify the x and y coordinate variables in the input data set. You must also specify a single GRID statement to include the grid information.
Table 1 outlines the options available in PROC KRIGE2D classified by function.
Table 1: Options Available in the KRIGE2D Procedure
| Task | Statement | Option |
|---|---|---|
| Data Set Options | ||
| Specifies input data set | PROC KRIGE2D | DATA= |
| Specifies grid data set | GRID | GDATA= |
| Specifies labels for individual grid points or in 1-D | GRID | LABEL |
| Specifies model data set | MODEL | MDATA= |
| Writes kriging predictions and standard errors | PROC KRIGE2D | OUTEST= |
| Writes neighborhood information for each grid point | PROC KRIGE2D | OUTNBHD= |
| Specifies plot display and options | PROC KRIGE2D | PLOTS |
| Declaring the Role of Variables | ||
| Specifies variables to define analysis subgroups | BY | |
| Specifies variable with observation labels | ID | |
| Specifies the variables to be predicted (kriged) | PREDICT | VAR= |
| Specifies the x and y coordinate variables in the DATA= data set | COORDINATES | XC= YC= |
| Specifies the x and y coordinate variables in the GDATA= data set | GRID | XC= YC= |
| Controlling the Prediction | ||
| Specifies the number of grid points in one-dimensional cases | GRID | NPTS= |
| Controlling Kriging Neighborhoods | ||
| Specifies the radius of a neighborhood for all grid points | PREDICT | RADIUS= |
| Specifies the number of neighbors for all grid points | PREDICT | NUMPOINTS= |
| Specifies the maximum of neighbors for all grid points | PREDICT | MAXPOINTS= |
| Specifies the minimum of neighbors for all grid points | PREDICT | MINPOINTS= |
| Specifies the action when maximum not met | PREDICT | NODECREMENT |
| Specifies the action when minimum not met | PREDICT | NOINCREMENT |
| Controlling the Semivariogram Model | ||
| Specifies an angle for an anisotropic model | MODEL | ANGLE= |
| Specifies a type with a functional form | MODEL | FORM= |
| Specifies an item store with correlation information | RESTORE | IN= |
| Specifies a nugget effect | MODEL | NUGGET= |
| Allows power exponent values outside [0,2) | MODEL | POWNOBOUND |
| Specifies a range parameter | MODEL | RANGE= |
| Specifies a minor-major axis ratio for an anisotropic model | MODEL | RATIO= |
| Specifies a scale parameter | MODEL | SCALE= |
| Specifies model and parameters from an item store | MODEL | STORESELECT |