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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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306 COXREG<br />

EXTERNAL Subcommand<br />

EXTERNAL specifies that the data for each split-file group should be held in an external<br />

scratch file during processing. This helps conserve working space when running analyses<br />

with large data sets.<br />

• The EXTERNAL subcommand takes no other keyword and is specified by itself.<br />

• If time-dependent covariates exist, external data storage is unavailable, and EXTERNAL is<br />

ignored.

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