search for: measurement3

...pes (fortunately only one value per measurement type per day). I want to know how I can separate this into multiple columns by measurement type averaged over the range of dates available. The output would have a single averaged measurement value per site. Site, Measurement 1, measurement2, measurement3, etc. I have been reading it in as a matrix as.matrix(read.table("myfile.txt", headers=TRUE)), but I don't quite know what to do with it afterward. Thanks [[alternative HTML version deleted]]

dear kind helper, i would like to know how to find the annual maximun for a table that basicly looks like this: date time measurement1 measurement2 measurement3 mm/dd/yyyy hh:mm:ss m1 m2 m3 there are about 9000 measurements for each year, which makes it quite large... i already tried to subset all rows for a year, to find the maximum within these choosen rows, y <- grep(yyyy,table[,1],value=TRUE) df <-table[with(table, date == y), ] df[with(df, m...