SPSS® 12.0 Command Syntax Reference

PLAN Subcommand
CSSELECT 341
The PLAN subcommand identifies the plan file whose specifications are to be used for
selecting sampling units. FILE specifies the name of the file. An error occurs if the file does
not exist.
CRITERIA Subcommand
The criteria subcommand is used to control the scope of execution and specify a seed value.
STAGES Keyword
STAGES specifies the scope of execution.
• By default all stages defined in the sampling plan are executed. STAGES is used to limit
execution to specific stages of the design.
• Specify one or more stages. The list can include up to three integer values. For example,
STAGES=1 2 3. If two or more values are provided they must be consecutive. An error
occurs if a stage is specified that does not correspond to a stage in the plan file.
• If the sample plan specifies a previous weight variable it is used in the first stage of the
plan.
• When executing latter stages of a multistage sampling design in which the earlier stages
have already been sampled, CSSELECT requires the cumulative sampling weights of the
last stage sampled in order to compute the correct final sampling weights for the whole
design. For example, say you have a three-stage design and have already executed the first
two stages of the design, saving the second-stage cumulative weights to
SampleWeightCumulative_2_. When you sample the third stage of the design, the working
data file must contain SampleWeightCumulative_2_ in order to compute the final
sampling weights.
SEED Keyword
SEED specifies the random number seed used by the CSSELECT procedure.
• By default, a random seed value is selected. To replicate a particular sample, the same
seed, sample plan, and sample frame should be specified when the procedure is executed.
• The CSSELECT seed value is independent of the global SPSS seed specified via the SET
command.
RANDOM A seed value is selected at random. This is the default.
value Specifies a custom seed value. The seed value must be a positive integer.