[R] Date Column error: 'origin' must be supplied

[Frederic Ntirenganya]

Thanks. It is helpful!

Frederic Ntirenganya
Maseno University,
African Maths Initiative,
Kenya.
Mobile:(+254)718492836
Email: fredo at aims.ac.za
https://sites.google.com/a/aims.ac.za/fredo/

On Fri, Dec 30, 2016 at 5:58 PM, Achim Zeileis <Achim.Zeileis at uibk.ac.at>
wrote:

> On Fri, 30 Dec 2016, Frederic Ntirenganya wrote:
>
> Hi All,
>>
>> I am creating date column on my data but getting the following error:
>>
>> #add date column dat1$Date=paste(as.Date(dat1$Year,dat1$Month,
>> dat1$Day, sep="-"))Error in as.Date.numeric(origin, ...) : 'origin'
>> must be supplied
>>
>
> You first need to paste() the character string and the coerce it with
> as.Date() - not the other way around:
>
> as.Date(paste(dat1$Year, dat1$Month, dat1$Day, sep="-"))
>
>
>>
>> I will appreciate any help from you guys. Thanks.
>> Here is the data.
>>
>>
>> dput(head(dat1))structure(list(Year = c(1984L, 1984L, 1984L, 1984L,
>> 1984L, 1984L
>> ), Month = c(1L, 1L, 1L, 1L, 1L, 1L), Day = 1:6, WindSpeed = c(5L,
>> 4L, 4L, 3L, 5L, 6L), Sunshine = c(6.3, 4.8, 0.6, 8.2, 7.3, 1.7
>> ), Tmax = c(27.4, 26.3, 22.9, 27.7, 28.5, 25.5), Tmin = c(14.5,
>> 16, 14.4, 14.8, 16.6, 15.4), Hmax = c(100L, 95L, 97L, 100L, 97L,
>> 99L), Hmin = c(45L, 62L, 72L, 55L, 54L, 63L), Station.Name =
>> structure(c(1L,
>> 1L, 1L, 1L, 1L, 1L), .Label = "KIGALI AERO", class = "factor"),
>>    Elevation = c(1490L, 1490L, 1490L, 1490L, 1490L, 1490L),
>>    Longitude = c(30.11, 30.11, 30.11, 30.11, 30.11, 30.11),
>>    Latitude = c(-1.95, -1.95, -1.95, -1.95, -1.95, -1.95)), .Names =
>> c("Year",
>> "Month", "Day", "WindSpeed", "Sunshine", "Tmax", "Tmin", "Hmax",
>> "Hmin", "Station.Name", "Elevation", "Longitude", "Latitude"),
>> row.names = c(NA,
>> 6L), class = "data.frame")
>>
>>
>> Best Regards,
>>
>> Fredo
>>
>>
>> Frederic Ntirenganya
>> Maseno University,
>> African Maths Initiative,
>> Kenya.
>> Mobile:(+254)718492836
>> Email: fredo at aims.ac.za
>> https://sites.google.com/a/aims.ac.za/fredo/
>>
>>         [[alternative HTML version deleted]]
>>
>> ______________________________________________
>> R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide http://www.R-project.org/posti
>> ng-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>>

	[[alternative HTML version deleted]]