Re: [R] Issue replacing dataset values from read data

1. It's not immediately clear why you need the line "temp <- subset(df, id == myid)" 2. The objects described by "temp$age", temp$agesmoke, and temp$yrsquit are all vectors. So temp.yrssmoke is also a vector. This means that when you replace, it should be with "<- temp.yrssmoke[i]", where "i" is t

Re: [R] Issue replacing dataset values from read data

Hi Emily, I haven't tested this exhaustively, but it seems to work: df<-data.frame(id=2001:3300,yrssmoke=sample(1:40,1300,TRUE), cigsdaytotal=sample(1:60,1300,TRUE),yrsquit=sample(1:20,1300,TRUE)) dfNA<-sapply(df$id,"%in%",c(2165,2534,2553,2611,2983,3233)) # create your NA values df[dfNA,c("yrsqu

[R] Issue replacing dataset values from read data

Dear all, I am reading a modest dataset (2297 x 644) with specific values I want to change. The code is inelegant but looks like this: df <- read.csv("mydata.csv", header = TRUE, stringsAsFactors = FALSE) # yrsquit, packyrs missing for following IDs. Manually change. for(myid in c(2165, 2534, 2