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SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

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RELEASE Statement<br />

MATRIX—END MATRIX 957<br />

Use the RELEASE statement to release the work areas in memory assigned to matrix variables<br />

that are no longer needed.<br />

• Specify a list of currently defined matrix variables. Variable names on the list must be separated<br />

by commas.<br />

• RELEASE discards the contents of the named matrix variables. Releasing a large matrix<br />

when it is no longer needed makes memory available for additional matrix variables.<br />

• All matrix variables are released when the END MATRIX statement is encountered.<br />

Macros Using the Matrix Language<br />

Macro expansion (see DEFINE—END DEFINE) occurs before command lines are passed to the<br />

matrix processor. Therefore, previously defined macro names can be used within a matrix program.<br />

If the macro name expands to one or more valid matrix statements, the matrix processor<br />

will execute those statements. Similarly, you can define an entire matrix program, including the<br />

MATRIX and END MATRIX commands, as a macro, but you cannot define a macro within a matrix<br />

program, since DEFINE and END DEFINE are not valid matrix statements.

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