Logical
A logical value is often created via comparison between variables.
> x = 1; y = 2 # sample values
> z = x > y # is x larger than y?
> z # print the logical value
[1] FALSE
> class(z) # print the class name of z
[1] "logical"
> z = x > y # is x larger than y?
> z # print the logical value
[1] FALSE
> class(z) # print the class name of z
[1] "logical"
Standard logical operations are "&" (and), "|" (or), and "!" (negation).
> u = TRUE; v = FALSE
> u & v # u AND v
[1] FALSE
> u | v # u OR v
[1] TRUE
> !u # negation of u
[1] FALSE
> u & v # u AND v
[1] FALSE
> u | v # u OR v
[1] TRUE
> !u # negation of u
[1] FALSE
Further details and related logical operations can be found in the R documentation.
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