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Is x a length of time?
is.timespan(x)
an R object
TRUE if x is a period, interval, duration, or difftime object, FALSE otherwise.
is.instant, is.duration, is.difftime, is.period, is.interval
is.instant
is.duration
is.difftime
is.period
is.interval
# NOT RUN { is.timespan(as.Date("2009-08-03")) # FALSE is.timespan(duration(second = 1)) # TRUE # }
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