CALL IDENTITY Routine

Converts the input matrix to an identity matrix.
Category: Matrix Operations
Requirement: The input matrix must be square.
Note: Diagonal element values of the matrix will be set to 1, and the rest of the values will be set to 0.
Syntax
Example

Syntax

CALL IDENTITY(X);

Required Argument

X
specifies an input matrix with dimensions m x m (that is, X[m, m]).

Example

The following example uses the IDENTITY CALL routine: 
options pageno=1 nodate;

proc fcmp;
   array mat1[3,3] (0.3, -0.78, -0.82, 0.54, 1.74, 1.2,
                     -1.3, 0.25, 1.49);
   call identity (mat1);
   put mat1=;
quit;
Output from the IDENTITY CALL Routine
                                The SAS System                               1

                              The FCMP Procedure

mat1[1, 1]=1 mat1[1, 2]=0 mat1[1, 3]=0 mat1[2, 1]=0 mat1[2, 2]=1 mat1[2, 3]=0
mat1[3, 1]=0 mat1[3, 2]=0 mat1[3, 3]=1
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