Sorry for the confusion, my sample data does not represent the actual data set.
The range of value can be from -ve to +ve values and 0 could be a true value of an observation. So, instead of replacing missing value by zero, I want exclude them from the calculation. On Sat, Apr 13, 2019 at 10:42 PM Jeff Newmiller <jdnew...@dcn.davis.ca.us> wrote: > > 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.
