factor conversion to date/time
On 02/05/2012 8:08 AM, marjolein post wrote:
Hi, I've been trying to convert numbers from an online temperature database into dates and time that R recognizes. I've tried as.Date, as.POSIXlt and strptime the problem is that the database has put a T between the numbers and R will not accept any conversions. currently it sees the date as a factor with the format as 1981-01-02T08:00I would like to keep only the year and month, but my primary focus is to get R to recognize it as a date.
To stop the conversion to factors, use argument stringsAsFactors=FALSE when you read the file, or even better, options(stringsAsFactors=FALSE) for a global change. To convert a string, specify the format (following the instructions in ?strptime): x <- "1981-01-02T08:00I" strptime(x, format="%Y-%m-%dT%H:%MI") Duncan Murdoch