how to remove last 3 letters from string including spaces in r -


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i have following dataframe in r

  date                    count      2016-12-30 17:25:00      34   2016-12-04 10:25:00      31

i want change format following , want remove seconds date

desired dataframe be

  date                 count   30-12-2016 17:25     34   04-12-2016 10:25     31

i doing following because of space inbetween date returning me wrong output

 substr(df$date,1,nchar(df$date)-3)

how can in r?

we convert posixct , format

df1$date <- format(as.posixct(df1$date), "%d-%m-%y %h:%m") df1$date #[1] "30-12-2016 17:25" "04-12-2016 10:25"

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