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Dear list, I want to create a POSIX time vector as follows: day <- as.character("110809") time.t <- 1:3600 t.min <- time.t %/% 60 t.sec <- time.t-t.min*60 DATE <- as.POSIXct(strptime(paste(day,t.min,t.sec),"%y%m%d %M%S")) Tail(DATE) The problem is that the last element (3600) returns a NA and I don't understand why. 600, 1200, 2400

Dear list, I have problem that I cannot solve and would like to ask your opinion. I tried to ask a few days ago already but got no answer and all my attempts to solve it by myself since then failed. Sorry for repeated posting! Here the problem broken down a bit. My problem basically is, that I want to use the elements of a character vector as names for objects and by recalling only the

Dear R list, I have a package downloaded and looked up a function in there. Now I find that it uses C code (.C call) to do part of its job. However, when I wanted to look that part up by using getAnywhere() I was told that no object of that name could be found. Then I tried typing C.(" funct.name") which only caused R to crash. Is there any way to look up the function? I'm not

Dear list, I have a table with entries for 20 animals - x and y coordinates to analyze movement with the package adehabitat. The package does all the necessary analyses, but I need to create an object of class ltraj for each animal first. For this kind of object I need to define xy coordinates, id, and few other things for each individual. Now I don't want to run a code 20 times