Is it possible to add the following code or similar in data.table: childseg<-0 x:=sumchild <-0 span<-rle(x)$lengths[rle(x)$values==TRUE childseg[x]<-rep(seq_along(span), times = span) childseg[childseg == 0]<-''
I was hoping to do this code by Group for mum, dad and child. The problem I'm having is with the span<-rle(x)$lengths[rle(x)$values==TRUE line which I'm not sure can be added to data.table. [Previous email had incorrect code] On Wed, Dec 31, 2014 at 3:45 AM, Jeff Newmiller <jdnew...@dcn.davis.ca.us> wrote: > I do not understand the value of using the rle function in your description, > but the code below appears to produce the table you want. > > Note that better support for the data.table package might be found at > stackexchange as the documentation specifies. > > x <- read.table( text= > "Dad Mum Child Group > AA RR RA A > AA RR RR A > AA AA AA B > AA AA AA B > RA AA RR B > RR AA RR B > AA AA AA B > AA AA RA C > AA AA RA C > AA RR RA C > ", header=TRUE, stringsAsFactors=FALSE ) > > library(data.table) > DT <- data.table( x ) > DT[ , cdad := as.integer( Dad %in% c( "AA", "RR" ) ) ] > DT[ , sumdad := 0L ] > DT[ 1==DT$cdad, sumdad := sum( cdad ), by=Group ] > DT[ , cdad := NULL ] > DT[ , cmum := as.integer( Mum %in% c( "AA", "RR" ) ) ] > DT[ , summum := 0L ] > DT[ 1==DT$cmum, summum := sum( cmum ), by=Group ] > DT[ , cmum := NULL ] > DT[ , cchild := as.integer( Child %in% c( "AA", "RR" ) ) ] > DT[ , sumchild := 0L ] > DT[ 1==DT$cchild, sumchild := sum( cchild ), by=Group ] > DT[ , cchild := NULL ] > >> DT > > Dad Mum Child Group sumdad summum sumchild > 1: AA RR RA A 2 2 0 > 2: AA RR RR A 2 2 1 > 3: AA AA AA B 4 5 5 > 4: AA AA AA B 4 5 5 > 5: RA AA RR B 0 5 5 > 6: RR AA RR B 4 5 5 > 7: AA AA AA B 4 5 5 > 8: AA AA RA C 3 3 0 > 9: AA AA RA C 3 3 0 > 10: AA RR RA C 3 3 0 > > > On Tue, 30 Dec 2014, Kate Ignatius wrote: > >> I'm trying to use both these packages and wondering whether they are >> possible... >> >> To make this simple, my ultimate goal is determine long stretches of >> 1s, but I want to do this within groups (hence using the data.table as >> I use the "set key" option. However, I'm I'm not having much luck >> making this possible. >> >> For example, for simplistic sake, I have the following data: >> >> Dad Mum Child Group >> AA RR RA A >> AA RR RR A >> AA AA AA B >> AA AA AA B >> RA AA RR B >> RR AA RR B >> AA AA AA B >> AA AA RA C >> AA AA RA C >> AA RR RA C >> >> And the following code which I know works >> >> hetdad <- as.numeric(x[c(1)]=="AA" | x[c(1)]=="RR") >> sumdad <- rle(hetdad)$lengths[rle(hetdad)$values==1] >> >> hetmum <- as.numeric(x[c(2)]=="AA" | x[c(2)]=="RR") >> summum <- rle(hetmum)$lengths[rle(hetmum)$values==1] >> >> hetchild <- as.numeric(x[c(3)]=="AA" | x[c(3)]=="RR") >> sumchild <- rle(hetchild)$lengths[rle(hetchild)$values==1] >> >> However, I wish to do the above code by Group (though this file is >> millions of rows long and groups will be larger but just wanted to >> simply the example). >> >> I did something like this but of course I got an error: >> >> LOH[,hetdad:=as.numeric(x[c(1)]=="AA" | x[c(1)]=="RR")] >> LOH[,sumdad:=rle(hetdad)$lengths[rle(hetdad)$values==1],by=Group] >> LOH[,hetmum:=as.numeric(x[c(2)]=="AA" | x[c(2)]=="RR")] >> LOH[,summum:=rle(hetmum)$lengths[rle(hetmum)$values==1],by=Group] >> LOH[,hetchild:=as.numeric(x[c(3)]=="AA" | x[c(3)]=="RR")] >> LOH[,sumchild:=rle(hetchild)$lengths[rle(hetchild)$values==1],by=Group] >> >> The reason being as I want to eventually have something like this: >> >> Dad Mum Child Group sumdad summum sumchild >> AA RR RA A 2 2 0 >> AA RR RR A 2 2 1 >> AA AA AA B 4 5 5 >> AA AA AA B 4 5 5 >> RA AA RR B 0 5 5 >> RR AA RR B 4 5 5 >> AA AA AA B 4 5 5 >> AA AA RA C 3 3 0 >> AA AA RA C 3 3 0 >> AA RR RA C 3 3 0 >> >> That is, I would like to have the specific counts next to what I'm >> consecutively counting per group. So for Group A for dad there are 2 >> AAs, there are two RRs for mum but only 1 AA or RR for the child and >> that is RR (so the 1 is next to the RR and not the RA). >> >> Can this be done? >> >> K. >> >> ______________________________________________ >> 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. >> > > --------------------------------------------------------------------------- > Jeff Newmiller The ..... ..... Go Live... > DCN:<jdnew...@dcn.davis.ca.us> Basics: ##.#. ##.#. Live Go... > Live: OO#.. Dead: OO#.. Playing > Research Engineer (Solar/Batteries O.O#. #.O#. with > /Software/Embedded Controllers) .OO#. .OO#. rocks...1k > --------------------------------------------------------------------------- ______________________________________________ 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.
