GRID Statement

The SIM2D Procedure

GRID Statement

GRID grid-options ;

The following options can be used to specify the grid of spatial locations at which to perform the simulations. A single GRID statement is required and is applied to all SIMULATE statements.

There are two basic methods for specifying the grid. You can specify the x and y coordinates explicitly, or they can be read from a SAS data set. The options for the explicit specification of grid locations are as follows.

X=number

X=x₁, ... ,x_m

X=x₁ to x_m

X=x₁ to x_m by $\delta x$

specifies the x coordinate of the grid locations.

Y=number

Y=y₁, ... ,y_m

Y=y₁ to y_m

Y=y₁ to y_m by $\delta y$

specifies the y coordinate of the grid locations.

For example, the following two GRID statements are equivalent:

   grid x=1,2,3,4,5  y=0,2,4,6,8,10;
   grid x=1 to 5 y=0 to 10 by 2;

To specify grid locations from a SAS data set, you must provide the name of the data set and the variables containing the values of the x and y coordinates.

GRIDDATA=SAS-data-set

GDATA=SAS-data-set

specifies a SAS data set containing the x and y grid coordinates.

XCOORD=(variable-name)

XC=(variable-name)

gives the name of the variable containing the x coordinate of the grid locations in the GRIDDATA= data set.

YCOORD=(variable-name)

YC=(variable-name)

gives the name of the variable containing the y coordinate of the grid locations in the GRIDDATA= data set.

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