Greetings R-devel group. When dealing with Inf dates, as.POSIXct seems to
return Inf, but is printed as NA:
> x1 <- as.POSIXct(Inf, origin = '1970-01-01')
> print(x1)
[1] NA
> is.na(x1)
[1] FALSE
> is.infinite(x1)
[1] TRUE
>
POSIXlt at least evaluates and prints the result consistently:
> x1 <- as.POSIXlt(Inf, origin = '1970-01-01')
> print(x1)
[1] NA
> is.na(x1)
[1] TRUE
>
I think the cause is due to format.POSIXct function calling format.POSIXlt,
hence printing as NA, but actually storing an Inf. I don't have an opinion on
what the actual result of as.POSIXct(Inf) should be, as long as what's printed
matches that value.
Thank you
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