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johnmyleswhite/factor_mult.R

Last active August 29, 2015 14:05
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Factor arithmetic
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factor_mult.R
> x <- 1
> f <- factor(x)
> f[1] * f[1]
[1] NA
Warning message:
In Ops.factor(f[1], f[1]) : * not meaningful for factors
> p <- f[1] * f[1]
Warning message:
In Ops.factor(f[1], f[1]) : * not meaningful for factors
> class(p)
[1] "logical"
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