try using a 'while': i <- 1 while (i < nrow(data) - 1) { diff.time <- round(data[i+1,2], 0) - round(data[i,2], 0)-1 old.row <- nrow(data) if (diff.time > 0) { fill <- c(data[i,1], (round(data[i,2], 0)+1), rep(0,classnumber)) data <- rbind(data[1:i,], fill, data[(i+1):old.row ,]) } i <- i+1 }
On 10/25/06, Kim Milferstedt <[EMAIL PROTECTED]> wrote: > > Hello, > > I have a time series of data as a data.frame. Occasionally there is > one or more days missing (e.g. data available for days 2, 3, 4, 8, 9, > 10 --> missing days between 4 and 8). The experimental time > information can be found in the 2nd column of "data". I would like to > have a continuous time line with one time point per day. Therefore I > try to insert lines for the missing days that contain zeros for the > data categories just to fill the columns. > > In most cases the code below works fine but there is one problem: > Since apparently the "for" statement does not get updated with the > exanding data.frame "data" (as lines get inserted), the "for" > statement ends somewhere before the end of the now longer modified > version of "data". Therefore potential missing data points afterwards > are not inserted any longer. > > Does anybody know how I can update the information on "i" in the > "for" statement along the way of the calculation? Or does anybody > know a way around my problem? > > Thanks already, > > Kim > > ### Code ### > > for (i in 1:(nrow(data)-1)) > { > diff.time <- round(data[i+1,2], 0) - round(data[i,2], 0)-1 > old.row <- nrow(data) > if (diff.time > 0) > { > fill <- c(data[i,1], > (round(data[i,2], 0)+1), rep(0,classnumber)) > data <- rbind(data[1:i,], fill, data[(i+1):old.row > ,]) > } > } > > __________________________________________ > > Kim Milferstedt > University of Illinois at Urbana-Champaign > Department of Civil and Environmental Engineering > 4125 Newmark Civil Engineering Laboratory > 205 North Mathews Avenue MC-250 > Urbana, IL 61801 > USA > phone: (001) 217 333-9663 > fax: (001) 217 333-6968 > email: [EMAIL PROTECTED] > http://cee.uiuc.edu/research/morgenroth > > ______________________________________________ > R-help@stat.math.ethz.ch 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. > -- Jim Holtman Cincinnati, OH +1 513 646 9390 What is the problem you are trying to solve? [[alternative HTML version deleted]] ______________________________________________ R-help@stat.math.ethz.ch 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.