Missing Values

The SURVEYSELECT Procedure

Missing Values

If an observation has a missing or nonpositive value for the SIZE variable, PROC SURVEYSELECT excludes that observation from the sample selection. The procedure writes a note to the log giving the number of observations omitted due to missing or nonpositive size measures.

PROC SURVEYSELECT treats missing STRATA variable values like any other STRATA variable value. The missing values form a separate stratum.

If a value of _NSIZE_ is missing in the SAMPSIZE= input data set, then PROC SURVEYSELECT writes an error message to the log and does not select a sample from that stratum. The procedure treats missing values of _NRATE_, _MINSIZE_, _MAXSIZE_, and _CERTSIZE_ similarly.

Chapter Contents
Previous
Next
Top