Hi, If your geology map is a special kind of object, this may not work, but if you are just dealing with a data frame or matrix type object named, "geology" with columns, something like this ought to do the trick:
geology[is.na(geology[, "landform"]), "landform"] <- 0 ?is.na returns a logical vector of TRUE/FALSE whether a value is missing which is used to index the data and then 0 is assigned to all those positions. HTH, Josh On Fri, May 6, 2011 at 1:12 PM, azam jaafari <azamjaaf...@yahoo.com> wrote: > Hello all > > I have a geology map that has three level, bellow > > <-geology > lithology landscape landform > > > landform level is used as covariate (with codes=1,2,3,4,5) for training of > neural network, but this level has missing data as NA. > I want to replace the missing data of landform level with 0 (zero). Finally, > landform will have codes 0,1,2,3,4,5. > > please help me > > Thanks alot. > [[alternative HTML version deleted]] > > > ______________________________________________ > R-help@r-project.org mailing list > 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. > > -- Joshua Wiley Ph.D. Student, Health Psychology University of California, Los Angeles http://www.joshuawiley.com/ ______________________________________________ R-help@r-project.org mailing list 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.
