Hi, Is there some alternative to cumsum for chron objects? I have data frames that contain some chron objects that look like this:
DateTime 13/10/03 12:30:35 NA NA NA 15/10/03 16:30:05 NA NA ... and I've been trying to replace the NA's so that a date/time sequence is created starting with the preceding available value. Because the number of rows with NA's following each available date/time is unknown, I've split the data frame using: splitdf <- split(df, as.factor(df$DateTime)) so that I can later use lapply to work on each "block" of data. I thought I could use cumsum and set the NA's to the desired interval to create the date/time sequence starting with the first row. However, this function is not defined for chron objects. Does anybody know of alternatives to create such a sequence? Thanks in advance, -- Sebastian P. Luque ______________________________________________ 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
