On Thu, 26 Jun 2014 10:42:54 AM Mangalani Peter Makananisa wrote:
> Hi,
>
> I am try to fix the data frame and I see that we only have two fields
> defined characters and numeric fields. How do I add date field on
the
> same data after using the as.Date & as.yearmon and be able to
manipulate
> the data on the date field(s)?
>
> Please advise
>
>
> Kind regards
>
> peter
>
Hi peter,
Let's say the two fields in your data frame are:
mydata$date<-c("2014-06-01","2014-06-02",...,"2014-06-30")
mydata$mintemp<-c(14,17,...,12)
If you want to change the character dates to date objects:
mydata$date<-as.Date(mydata$date,"%Y-%m-%d")
If your data frame doesn't contain the dates already:
mydata$weather<-c("clear","cloudy",...,"rain")
mydata$mintemp<-c(14,17,...,12)
and you have a vector of the dates as character fields:
mydates<-c("2014-06-01","2014-06-02",...,"2014-06-30")
mydata$date<-as.Date(mydates,"%Y-%m-%d")
Jim
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