interval,
using typical mathematical notation.
interval(ch)interval object.
interval class documentation,
notably its reference to more sophisticated interval classes available
for R.
interval("[0, 1)")
## Two ways to specify open interval borders:
identical(interval("]-1,1["),
interval("(-1,1)"))
## infinite :
interval("[0, Inf)")
## arithmetic with scalars works:
4 + 2 * interval("[0, 1.5)") # -> [4, 7)
## str() to look at internals:
str( interval("[1.2, 7]") )
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