Hi Dila, If 'dat' is the dataset: dat$C[dat$B==0] <- 0
A.K. On Wednesday, April 9, 2014 1:30 AM, dila radi <dilarad...@gmail.com> wrote: Dear arun Yes indeed..if the value in B is O..next value in the same row also 0.. other value than 0 remains unchanged. On Apr 9, 2014 12:48 PM, "arun" <smartpink...@yahoo.com> wrote: Dear Dila, > >What I understand from your two rules are that there is only one rule and that >is concerning with '0' for B. All other values are left without any change. > > > > > >On Wednesday, April 9, 2014 12:45 AM, dila radi <dilarad...@gmail.com> wrote: > >Dear Arun >I just concern on values 1 and 0 only. Other values did not follow the rules I >mention before. Thank you. >Dila >On Apr 8, 2014 5:28 PM, "arun" <smartpink...@yahoo.com> wrote: > >HI, >>What about values >1.0 for B? Does it also follow the same rule as your >>second rule. >>A.K. >> >> >> >> >> >>On Tuesday, April 8, 2014 12:11 AM, dila radi <dilarad...@gmail.com> wrote: >>Hi all, >> >>I have problem on how to replace value. I have this kind of data set: >> >>structure(list(A = c(0, 12.6, 10.1, 8.1, 14.4, 0, 0, 0, 0, 0.5, >>12.9, 25.9, 49, 0, 0, 0, 0, 0, 7.8), B = c(0, 0, 9.1, 9.3, 1.5, >>1, 1, 1, 1.7, 6, 0, 0, 0, 1.7, 3.8, 0, 0, 0, 1), C = c(1, 1, >>9.100000004, 9.299999999, 1.5, 1, 1, 1, 1.7, 5.999999999, 1, >>1, 1, 1.7, 3.800000001, 1, 1, 1, 1)), .Names = c("A", "B", "C" >>), row.names = c(NA, 19L), class = "data.frame") >> >>The problem is the value under variable 'C'. It supposed to be like this: >> >>1) When value is '0' under variable 'B', the next value under variable 'C' >>also should be '0'. >> >>2) When value is '1' under variable 'B', there is no changes for values >>under variable 'C'. >> >>How do I achieved this by fulfill these two conditions? Thank you so much. >> >> >>Regards, >>Dila >> >> [[alternative HTML version deleted]] >> >>______________________________________________ >>R-help@r-project.org mailing list >>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 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.