I have dissolved oxygen traces that are continuous (fifteen minutes) for two years (save for a couple of days, weeks, or minutes there depending on the perogative of the river). These traces are spaced out by river mile. I have figured out how to prepare data as to the sunspot example, but I can not figure out how to get multiple traces into the prepSEIS function and this is the warning that I get Warning messages: 1: In notes[j] = paste(sep = " ", GG[[ima]]$sta, GG[[ima]]$comp) : number of items to replace is not a multiple of replacement length 2: In stns[j] = GG[[ima]]$sta : number of items to replace is not a multiple of replacement length when I plot this I get what I think is a signal composed of all of the traces, and if I look at the results of prepSEIS it has compressed (I think) all of the signals to one. x <- read.csv("testDO.csv", header=T) x.ts <- ts(x, deltat=4/60) a <-x.ts[,1] b <- x.ts[,2] c <- x.ts[,3] d <- x.ts[,4] GG <- prep1wig(wig = c(a, b, c, d), sta=c("RM215", "RM202", "RM198", "RM190", comp="DO", units="mg/L")) # I have also tried this without breaking it up into individual data frames xx <- prepREIS(GG) plot(x.ts) is what I want to go into PICK.GEN Any help would be greatly appreciated- I am sure I am missing something. thank you very much Stephen Sefick -- Let's not spend our time and resources thinking about things that are so little or so large that all they really do for us is puff us up and make us feel like gods. We are mammals, and have not exhausted the annoying little problems of being mammals. -K. Mullis [[alternative HTML version deleted]]