Apologies - mix up of syntax all over the place, a habit of mine. The last line was in there because of code beforehand so it really doesn't need to be there. Here is the proper code I hope:
childseg<-0 x<-sumchild ==0 span<-rle(x)$lengths[rle(x)$values==TRUE] childseg[x]<-rep(seq_along(span), times = span) On Thu, Jan 1, 2015 at 12:13 PM, Jeff Newmiller <jdnew...@dcn.davis.ca.us> wrote: > Thank you for attempting to encode what you want using R syntax, but you are > not really succeeding yet (too many errors). Perhaps another hand generated > result would help? A new input data frame might or might not be needed to > illustrate desired results. > > Your second and third lines are syntactically incorrect, and I don't > understand what you hope to accomplish by assigning an empty string to a > numeric in your last line. > --------------------------------------------------------------------------- > 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 > --------------------------------------------------------------------------- > Sent from my phone. Please excuse my brevity. > > On January 1, 2015 4:16:52 AM PST, Kate Ignatius <kate.ignat...@gmail.com> > wrote: >>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.