WEIGHT BY var_name. WEIGHT OFF.
WEIGHT assigns cases varying weights,
changing the frequency distribution of the active dataset. Execution of
WEIGHT is delayed until data have been read.
If a variable name is specified,
WEIGHT causes the values of that
variable to be used as weighting factors for subsequent statistical
procedures. Use of keyword
BY is optional but recommended. Weighting
variables must be numeric. Scratch variables may not be used for
weighting (see Scratch Variables).
OFF is specified, subsequent statistical procedures will weight all
A positive integer weighting factor w on a case will yield the same statistical output as would replicating the case w times. A weighting factor of 0 is treated for statistical purposes as if the case did not exist in the input. Weighting values need not be integers, but negative and system-missing values for the weighting variable are interpreted as weighting factors of 0. User-missing values are not treated specially.
WEIGHT is specified after
TEMPORARY, it affects only
the next procedure (see TEMPORARY).
WEIGHT does not cause cases in the active dataset to be
replicated in memory.