27.03.2013 Views

SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

SPSS® 12.0 Command Syntax Reference

SHOW MORE
SHOW LESS

Create successful ePaper yourself

Turn your PDF publications into a flip-book with our unique Google optimized e-Paper software.

526 EXAMINE<br />

cases. MESTIMATORS with no keywords produces Huber’s M-estimator with c=1.339;<br />

Andrews’ wave with c=1.34π; Hampel’s M-estimator with a=1.7, b=3.4, and c=8.5; and<br />

Tukey’s biweight with c=4.685.<br />

HUBER(c) Huber’s M-estimator. The value of weighting constant c can be specified in<br />

parentheses following the keyword. The default is c=1.339.<br />

ANDREW(c) Andrews’ wave estimator. The value of weighting constant c can be specified<br />

in parentheses following the keyword. Constants are multiplied by π. The default<br />

is 1.34π.<br />

HAMPEL(a,b,c) Hampel’s M-estimator. The values of weighting constants a, b, and c can be<br />

specified in order in parentheses following the keyword. The default values<br />

are a=1.7, b=3.4, and c=8.5.<br />

TUKEY(c) Tukey’s biweight estimator. The value of weighting constant c can be specified<br />

in parentheses following the keyword. The default is c=4.685.<br />

ALL All four above M-estimators. This is the default when MESTIMATORS is<br />

specified with no keyword. The default values for weighting constants are<br />

used.<br />

NONE No M-estimators. This is the default if MESTIMATORS is omitted.<br />

Example<br />

EXAMINE VARIABLE=CASTTEST /MESTIMATORS.<br />

• MESTIMATORS generates all four M-estimators computed with the default constants.<br />

Example<br />

EXAMINE VARIABLE=CASTTEST /MESTIMATORS=HAMPELS(2,4,8).<br />

• MESTIMATOR produces Hampel’s M-estimator with weighting constants a=2, b=4, and c=8.<br />

MISSING Subcommand<br />

MISSING controls the processing of missing values in the analysis. The default is LISTWISE,<br />

EXCLUDE, and NOREPORT.<br />

• LISTWISE and PAIRWISE are alternatives and apply to all variables. They are modified for<br />

dependent variables by INCLUDE/EXCLUDE and for factor variables by REPORT/NOREPORT.<br />

• INCLUDE and EXCLUDE are alternatives; they apply only to dependent variables.<br />

• REPORT and NOREPORT are alternatives; they determine if missing values for factor<br />

variables are treated as valid categories.<br />

LISTWISE Delete cases with missing values listwise. A case with missing values for any<br />

dependent variable or any factor in the model specification is excluded from<br />

statistics and plots unless modified by INCLUDE or REPORT. This is the default.

Hooray! Your file is uploaded and ready to be published.

Saved successfully!

Ooh no, something went wrong!