You might take a look at the reshape package, which switches from 'long' to 'wide' formats and vice versa in a fairly flexible way.
S Ellison > -----Original Message----- > From: R-help [mailto:r-help-boun...@r-project.org] On Behalf Of lily li > Sent: 13 November 2018 07:22 > To: R mailing list > Subject: [R] How to create gridded data > > Hi R users, > > I have a question about manipulating data. For example, I have DF1 as the > following, how to transform it to a gridded dataset DF2? In DF2, each value > Precip is an attribute of the corresponding grid cell. So DF2 is like a > spatial surface, and can be imported to ArcGIS. Thanks for your help. > > DF1 > latitude longitude Precip > 45.5 110.5 3.2 > 45.5 111 5.0 > 45.5 111.5 1.8 > 45.5 112 2.0 > 46 110.5 6.1 > 46 111 4.5 > 46 111.5 7.8 > 46 112 5.5 > ... > > > DF2 > 6.1 4.5 7.8 5.5 > 3.2 5.0 1.8 2.0 > ... > > [[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. ******************************************************************* This email and any attachments are confidential. Any use...{{dropped:8}} ______________________________________________ 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.
