My data, DATA, has a variable, TIME, for which the values print out in this format: "11/14/2006 20:10". For TIME, its mode is numeric and its class is a factor.
I need to convert TIME to a proper date/time variable (DTIME) and add the new DTIME to DATA as date.time. I was told I may have to coerce the time values so that they follow the h:m:s format...Think character string manipulation. Below is my code:
library("chron")
VAR=c(as.character(DATA$TIME))
DT<-t(as.data.frame(strsplit(VAR," ")))
DT[1:3,]
row.names(DT)<-NULL
DT[1:3,]
DTIME<-chron(dates=DT[,1],times=DT[,2],
format=c("m/d/y","h:m"))
But once I run the last line of code, I get the following error message:
Error in convert.times(times., format = format[[2]]) :
format h:m may be incorrect
In addition: Warning message:
In is.na(out$s) : is.na() applied to non-(list or vector) of type 'NULL'
I don't understand what this means, much less how to fix it.
Its not clear from the question exactly what you have -- in such cases its best to show the output of dput applied to your variable -- but assuming you can convert it to character format using as.character or format then its just a matter of using as.chron :
> library(chron)
> TIME <- "11/14/2006 20:10"
> as.chron(TIME, "%m/%d/%Y %H:%M")
[1] (11/14/06 20:10:00)