Looks to me like your initial request contradicts your clarification. Can you explain this discrepancy?
On April 13, 2019 8:29:59 PM PDT, Val <valkr...@gmail.com> wrote: >Hi Bert and Jim, >Thank you for the suggestion. >However, those missing values should not be replaced by 0's. >I want exclude those missing values from the calculation and create >the index using only the non-missing values. > > >On Sat, Apr 13, 2019 at 10:14 PM Jim Lemon <drjimle...@gmail.com> >wrote: >> >> Hi Val, >> For this particular problem, you can just replace NAs with zeros. >> >> vdat[is.na(vdat)]<-0 >> vdat$xy <- 2*(vdat$x1) + 5*(vdat$x2) + 3*(vdat$x3) >> vdat >> obs Year x1 x2 x3 xy >> 1 1 2001 25 10 10 130 >> 2 2 2001 0 15 25 150 >> 3 3 2001 50 10 0 150 >> 4 4 2001 20 0 60 220 >> >> Note that this is not a general solution to the problem of NA values. >> >> Jim >> >> On Sun, Apr 14, 2019 at 12:54 PM Val <valkr...@gmail.com> wrote: >> > >> > Hi All, >> > I have a data frame with several columns and I want to create >> > another column by using the values of the other columns. My >> > problem is that some the row values for some columns have missing >> > values and I could not get the result I waned . >> > >> > Here is the sample of my data and my attempt. >> > >> > vdat<-read.table(text="obs, Year, x1, x2, x3 >> > 1, 2001, 25 ,10, 10 >> > 2, 2001, , 15, 25 >> > 3, 2001, 50, 10, >> > 4, 2001, 20, , 60",sep=",",header=TRUE,stringsAsFactors=F) >> > vdat$xy <- 0 >> > vdat$xy <- 2*(vdat$x1) + 5*(vdat$x2) + 3*(vdat$x3) >> > vdat >> > >> > obs Year x1 x2 x3 xy >> > 1 1 2001 25 10 10 130 >> > 2 2 2001 NA 15 25 NA >> > 3 3 2001 50 10 NA NA >> > 4 4 2001 20 NA 60 NA >> > >> > The desired result si this, >> > >> > obs Year x1 x2 x3 xy >> > 1 1 2001 25 10 10 130 >> > 2 2 2001 NA 15 25 150 >> > 3 3 2001 50 10 NA 150 >> > 4 4 2001 20 NA 60 220 >> > >> > How do I get my desired result? >> > Thank you >> > >> > ______________________________________________ >> > 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. > >______________________________________________ >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. -- Sent from my phone. Please excuse my brevity. ______________________________________________ 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.
