| http://www.w3.org/ns/prov#value | - In SAS, many procedures accept a class statement, while in R a variable can be defined as a factor, for example by using as.factor.Let's consider a simple example with the following display of a categorical variable and the resulting indicators.id catvar indA indB indC1 A 1 0 0 2 B 0 1 03 D 0 0 04 C 0 0 15 B 0 1 06 D 0
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