On 02/03/2014 12:53 PM, Yolande Tra wrote:
Hi,
I have the following issue. The dataframe df has a column (Date1) supposed
to be a date but read as a factor. There are two types of values in the
same column Date1
Type 1 are datetime like "5/23/2008 0:00:00"
Type 2 have no time like "1/10/13".
When I apply the following to the date column
df$Date1<-as.POSIXct(as.character(df$Date1, format = "%d/%m/%Y"))
For type 1 I got the expected result: "2008-05-23"
For type 2 I got NA.
I have searched but could not solve it. Please help.
Hi Yolande,
Try this:
# first get the dates with times
df$Date1<-
as.POSIXct(as.character(df$Date1, format = "%m/%d/%Y %H:%M:%S"))
# then fill in the ones without times
df$Date1[nchar(df$Date1) < 10]<-
as.POSIXct(as.character(df$Date1, format = "%m/%d/%y"))
Notice that I think you got the month/day order wrong, if your first
type is correct.
Jim
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