Iteratively Processing Observations from a Data Set
Previous examples of DATA
steps used DO loops to generate one or more observations from one
iteration of the DATA step. It is also possible to write a DATA step
that reads a data set to compute the value of a new variable.
The SAS data set Finance.CDRates
contains interest rates for certificates of deposit (CDs) that are
available from several institutions.
Suppose you want to
compare how much each CD earns at maturity with an investment of $5,000.
The DATA step below creates a new data set, Work.Compare, that contains
the added variable, Investment.
data work.compare(drop=i); set finance.cdrates; Investment=5000; do i=1 to years; investment+rate*investment; end; run; proc print data=work.compare ...
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