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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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1360 REGRESSION<br />

PIN[(value)] Probability of F-to-enter. The default value is 0.05. Either PIN or FIN<br />

can be specified. If more than one is used, the last one specified is in<br />

effect.<br />

FIN[(value)] F-to-enter. The default value is 3.84. Either PIN or FIN can be specified.<br />

If more than one is used, the last one specified is in effect.<br />

POUT[(value)] Probability of F-to-remove. The default value is 0.10. Either POUT or<br />

FOUT can be specified. If more than one is used, the last one specified<br />

is in effect.<br />

FOUT[(value)] F-to-remove. The default value is 2.71. Either POUT or FOUT can be<br />

specified. If more than one is used, the last one specified is in effect.<br />

TOLERANCE[(value)] Tolerance. The default value is 0.0001. If the specified tolerance is<br />

very low, REGRESSION issues a warning.<br />

MAXSTEPS[(n)] Maximum number of steps. The value of MAXSTEPS is the sum of the<br />

maximum number of steps for each method for the equation. The<br />

default values are, for the BACKWARD or FORWARD methods, the<br />

number of variables meeting PIN/POUT or FIN/FOUT criteria, and for<br />

the STEPWISE method, twice the number of independent variables.<br />

Confidence Intervals<br />

CIN[(value)] Reset the value of the percent for confidence intervals. The default is<br />

95%. The specified value sets the percentage interval used in the computation<br />

of temporary variable types MCIN and ICIN. (See the list of<br />

temporary variable types on p. 1368.)<br />

Example<br />

REGRESSION VARIABLES=POP15 TO GROWTH, SAVINGS<br />

/CRITERIA=PIN(.1) POUT(.15)<br />

/DEPENDENT=SAVINGS<br />

/METHOD=FORWARD.<br />

• The CRITERIA subcommand relaxes the default criteria for entry and removal for the<br />

FORWARD method. Note that the specified PIN is less than POUT.<br />

ORIGIN and NOORIGIN Subcommands<br />

ORIGIN and NOORIGIN control whether or not the constant is suppressed. By default, the<br />

constant is included in the model (NOORIGIN).<br />

• The specification is either the ORIGIN or NOORIGIN subcommand.<br />

• ORIGIN and NOORIGIN must be specified before the DEPENDENT and METHOD subcommands.<br />

The last specified remains in effect for all equations.<br />

• ORIGIN requests regression through the origin. The constant term is suppressed.<br />

• If you specify ORIGIN, statistics requested on the DESCRIPTIVES subcommand are computed<br />

as if the mean were 0.

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