Thank you I believe that is just what I was looking for. Brian
On Dec 2, 2012, at 12:37 AM, Berend Hasselman [via R] <ml-node+s789695n4651599...@n4.nabble.com> wrote: > > On 02-12-2012, at 06:06, Brian Feeny wrote: > > > Thank you for your response, here is a better example of what I am trying > > to do: > > > > data(iris) > > index_setosa <- which(iris$Species == "setosa") > > iris_setosa <- data.frame() > > iris_setosa[index_setosa,] <-iris[index_setosa,] > > iris_others <- data.frame() > > iris_others[-index_setosa,] <- iris[-index_setosa,] > > > > Change you example to make it actually do something > > data(iris) > index_setosa <- which(iris$Species == "setosa") > iris_setosa <-iris[index_setosa,] > head(iris_setosa) > > # iris_others <- data.frame() > # iris_others[-index_setosa,] <- iris[-index_setosa,] > iris_others <- iris[-index_setosa,] > head(iris_others) > tail(iris_others) > > The head() and tail() calls are for checking. > Combine the two like this > > z <- rbind(iris_setosa,iris_others) > head(z) > tail(z) > > Berend > > > So the idea would be that iris_setosa is a dataframe of size 150, with 50 > > observations of setosa, > > using their original same indices, and 100 observations of NA. Likewise > > iris_others would be > > 100 observations of species besides setosa, using their original indices, > > and there would be 50 NA's. > > > > The above doesn't work. When I execute it, I am left with iris_setosa > > having 0 columns, I wish it to have all > > the original columns of iris. > > > > That said, once I get past the above (being able to split them out and keep > > original indices), I wish to be able to combine > > iris_setosa and iris_others so that iris_combined is a data frame with no > > NA's and all the original data. > > > > Does this make sense? So I am basically taking a dataframe, splitting it > > based on some criteria, and working on the two > > split dataframes separately, and then I wish to recombine. > > > > Brian > > > > > > So at this point, I have iris_setosa a dataframe of size > > On Dec 1, 2012, at 11:34 PM, William Dunlap wrote: > > > >>> newdataset[testindex] = testset[testindex] > >>> object 'dataset' not found > >> > >> Is that really what R printed? I get > >>> newdataset[testindex] = testset[testindex] > >> Error in newdataset[testindex] = testset[testindex] : > >> object 'newdataset' not found > >> but perhaps you have a different problem. Copy and paste > >> (and read) the error message you got. > >> > >> Bill Dunlap > >> Spotfire, TIBCO Software > >> wdunlap tibco.com > >> > >> > >>> -----Original Message----- > >>> From: [hidden email] [mailto:[hidden email]] On Behalf > >>> Of Brian Feeny > >>> Sent: Saturday, December 01, 2012 8:04 PM > >>> To: [hidden email] > >>> Subject: [R] How to re-combine values based on an index? > >>> > >>> I am able to split my df into two like so: > >>> > >>> dataset <- trainset > >>> index <- 1:nrow(dataset) > >>> testindex <- sample(index, trunc(length(index)*30/100)) > >>> trainset <- dataset[-testindex,] > >>> testset <- dataset[testindex,-1] > >>> > >>> So I have the index information, how could I re-combine the data using > >>> that back into a > >>> single df? > >>> > >>> I tried what I thought might work, but failed with: > >>> > >>> newdataset[testindex] = testset[testindex] > >>> object 'dataset' not found > >>> newdataset[-testindex] = trainset[-testindex] > >>> object 'dataset' not found > >>> > >>> Brian > >>> > >>> ______________________________________________ > >>> [hidden email] 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. > > > > ______________________________________________ > > [hidden email] 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. > > ______________________________________________ > [hidden email] 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. > > > If you reply to this email, your message will be added to the discussion > below: > http://r.789695.n4.nabble.com/How-to-re-combine-values-based-on-an-index-tp4651594p4651599.html > To unsubscribe from How to re-combine values based on an index?, click here. > NAML -- View this message in context: http://r.789695.n4.nabble.com/How-to-re-combine-values-based-on-an-index-tp4651594p4651600.html Sent from the R help mailing list archive at Nabble.com. [[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.
