Good point about 29-Feb...fixed in the following: format(as.Date(paste0(x,"-2016"),format='%d-%b-%Y'),'%b')
# Also: The date functions can be used to easily calculate passage of time and offer good flexibility for formatting output. -Dan P.S. "harder to understand" is in the eye of the beholder (as is "recommended"). On Wed, Mar 9, 2016 at 4:39 PM, Jeff Newmiller <jdnew...@dcn.davis.ca.us> wrote: > Still not recommended. That takes more steps, is harder to understand, and > will break when given "29-Feb" as input. > -- > Sent from my phone. Please excuse my brevity. > > On March 9, 2016 4:15:31 PM PST, "Dalthorp, Daniel" <ddalth...@usgs.gov> > wrote: >> >> Or: >> >> x <- c( "3-Oct", "10-Nov" ) >> format(as.Date(paste0(x,rep("-1970",length(x))),format='%d-%b-%Y'),'%b') >> >> # the 'paste0' appends a year to the text vector >> # the 'as.Date' interprets the strings as dates with format 10-Jun-2016 >> (e.g.) >> # the 'format' returns a string with date in format '%b' (which is just >> the name of the month) >> >> On Wed, Mar 9, 2016 at 3:52 PM, Jeff Newmiller <jdnew...@dcn.davis.ca.us> >> wrote: >> >>> Your dates are incomplete (no year) so I suggest staying away from the >>> date functions for this. Read ?regex and ?sub. >>> >>> x <- c( "3-Oct", "10-Nov" ) >>> m <- sub( "^\\d+-([A-Za-z]{3})$", "\\1", x ) >>> >>> -- >>> Sent from my phone. Please excuse my brevity. >>> >>> On March 9, 2016 10:14:25 AM PST, KMNanus <kmna...@gmail.com> wrote: >>> >I have a series of dates in format 3-Oct, 10-Oct, 20-Oct, etc. >>> > >>> >I want to create a variable of just the month. If I convert the date >>> >to a character string, substr is ineffective because some of the dates >>> >have 5 characters (3-Oct) and some have 6 (10-Oct). >>> > >>> >Is there a date function that accomplishes this easily? >>> > >>> >Ken >>> >kmna...@gmail.com >>> >914-450-0816 (tel) >>> >347-730-4813 (fax) >>> > >>> > >>> > >>> >______________________________________________ >>> >R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >>> >https://stat.ethz.ch/mailman/listinfo/r-help >>> >PLEASE do read the posting guide >>> >http://www.R-project.org/posting-guide.html >>> >and provide commented, minimal, self-contained, reproducible code. >>> >>> [[alternative HTML version deleted]] >>> >>> ______________________________________________ >>> R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see >>> https://stat.ethz.ch/mailman/listinfo/r-help >>> PLEASE do read the posting guide >>> http://www.R-project.org/posting-guide.html >>> and provide commented, minimal, self-contained, reproducible code. >>> >> >> >> >> -- >> Dan Dalthorp, PhD >> USGS Forest and Rangeland Ecosystem Science Center >> Forest Sciences Lab, Rm 189 >> 3200 SW Jefferson Way >> Corvallis, OR 97331 >> ph: 541-750-0953 >> ddalth...@usgs.gov >> >> -- Dan Dalthorp, PhD USGS Forest and Rangeland Ecosystem Science Center Forest Sciences Lab, Rm 189 3200 SW Jefferson Way Corvallis, OR 97331 ph: 541-750-0953 ddalth...@usgs.gov [[alternative HTML version deleted]] ______________________________________________ R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.