Arithmetic Operations and Comparisons (MATRIX-END MATRIX command)

The expression on a COMPUTE statement can be formed from matrix constants and variables, combined with the arithmetic, relational, and logical operators discussed above. Matrix constructions and matrix functions are also allowed.

Examples

COMPUTE PI = 3.14159265.
COMPUTE RSQ = R * R.
COMPUTE FLAGS = EIGENVAL >= 1.
COMPUTE ESTIM = {OBS, PRED, ERR}.

• The first statement computes a scalar. Note that the braces are optional on a scalar constant.
• The second statement computes the square of the matrix R. R can be any square matrix, including a scalar.
• The third statement computes a vector named FLAGS, which has the same dimension as the existing vector EIGENVAL. Each element of FLAGS equals 1 if the corresponding element of EIGENVAL is greater than or equal to 1, and 0 if the corresponding element is less than 1.
• The fourth statement constructs a matrix ESTIM by concatenating the three vectors or matrices OBS, PRED, and ERR. The component matrices must have the same number of rows.