Are you looking for something like this? data <- data.frame(first= c(1,2,3,4,5,6,7,8), zehn = c(15,NA,NA,NA,NA,18,NA,25), second = c(4,NA,7,9,NA,10.2,NA,12), third= c(6,7,NA,NA,10,12,NA,16)) data library(zoo) data2 <-na.approx(data,na.rm=F) data2 ?na.approx Felipe D. Carrillo Supervisory Fishery Biologist Department of the Interior US Fish & Wildlife Service California, USA
----- Original Message ---- > From: Jessica Schedlbauer <jsche...@fiu.edu> > To: "r-help@r-project.org" <r-help@r-project.org> > Sent: Sun, May 2, 2010 2:27:10 PM > Subject: [R] Question re: interpolation > > Hello, I have a matrix in which two variables, x and y, are used together > to determine z. The variables x and y are sorted into classes. > Specifically, values for variable x range from 0 to 2.7 and are sorted into > class increments of 0.15 and variable y ranges from 0-2100 with class > increments > of 100. For each x-y class combination, I have calculated a mean value of > z from existing data. However there are gaps in the existing data (i.e., > x-y combinations for which there are no z data). I would like to > interpolate values to fill in these missing datapoints, but have so far been > unable to find a straightforward way of doing so in R. There are many gaps > in the data and I need to repeat this process for several individual > datasets. That said, I am looking for a way to avoid interpolating each > missing point separately. Any suggestions would be greatly > appreciated. Regards, Jessica > Schedlbauer ______________________________________________ > ymailto="mailto:R-help@r-project.org"; > href="mailto:R-help@r-project.org";>R-help@r-project.org mailing list > href="https://stat.ethz.ch/mailman/listinfo/r-help"; target=_blank > >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. ______________________________________________ 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.
