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SPSS® 12.0 Command Syntax Reference

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1046 NLR<br />

Basic Specification<br />

The basic specification requires three commands: MODEL PROGRAM, COMPUTE (or any<br />

other computational transformation command), and [C]NLR.<br />

• The MODEL PROGRAM command assigns initial values to the parameters and signifies the<br />

beginning of the model program.<br />

• The computational transformation command generates a new variable to define the<br />

model. The variable can take any legitimate name, but if the name is not PRED, the PRED<br />

subcommand will be required.<br />

• The [C]NLR command provides the regression specifications. The minimum specification<br />

is the dependent variable.<br />

• By default, the residual sum of squares and estimated values of the model parameters are<br />

displayed for each iteration. Statistics generated include regression and residual sums of<br />

squares and mean squares, corrected and uncorrected total sums of squares, , param-<br />

eter estimates with their asymptotic standard errors and 95% confidence intervals, and an<br />

asymptotic correlation matrix of the parameter estimates.<br />

<strong>Command</strong> Order<br />

• The model program, beginning with the MODEL PROGRAM command, must precede the<br />

[C]NLR command.<br />

• The derivatives program (when used), beginning with the DERIVATIVES command, must<br />

follow the model program but precede the [C]NLR command.<br />

• The constrained functions program (when used), beginning with the CONSTRAINED<br />

FUNCTIONS command, must immediately precede the CNLR command. The constrained<br />

functions program cannot be used with the NLR command.<br />

• The CNLR command must follow the block of transformations for the model program and<br />

the derivatives program when specified; the CNLR command must also follow the constrained<br />

functions program when specified.<br />

• Subcommands on [C]NLR can be named in any order.<br />

<strong>Syntax</strong> Rules<br />

• The FILE, OUTFILE, PRED, and SAVE subcommands work the same way for both CNLR<br />

and NLR.<br />

• The CRITERIA subcommand is used by both CNLR and NLR, but iteration criteria are different.<br />

Therefore, the CRITERIA subcommand is documented separately for CNLR and<br />

NLR.<br />

• The BOUNDS, LOSS, and BOOTSTRAP subcommands can be used only with CNLR. They<br />

cannot be used with NLR.<br />

R 2

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