[R] How to read in data

[Mathieu Ros]

>>>>> "AP" == Anne Piotet <Anne.Olga.Piotet at omsv.vd.ch> disait:

    AP> Hello, I'm new to R and in the process of testing it My first
    AP> question: I fail to read in my data (ANSI toto.txt file, tab
    AP> separated)
    >> test <-read.table("toto.txt")
    AP>             Error in file(file, "r") : unable to open
    AP> connection In addition: Warning message: cannot open file
    AP> `toto.txt'
    >> test <- scan("C:\\toto.txt")
    AP>             Error in scan("C:\\toto.txt") : "scan" expected a
    AP> real, got "No_D"
    >> test <-scan("test.dat")
    AP>             Error in file(file, "r") : unable to open
    AP> connection In addition: Warning message: cannot open file
    AP> `toto.txt (and no, it is not read only or locked or whatever)
    AP> I use Windows 2000/XP

I think
read.table("C:\\toto.txt",header=TRUE)
will do the job : the message you got on your first and third attempts
means that you gave a wrong path to your file.
otherwise, read the help for read.table carefully (header and skip parameters).

    AP> second question...what are the size limits of statistical
    AP> files I can handle? I plan to analize plant datas (up to
    AP> 500'000 records, from which I will analize a restrictive set
    AP> of variates ) Even when broken down by some chracteristics,
    AP> the data to analize can have 50'000-100'000 records

    AP> Well thank for the help Anne
de rien ;)

regards,

--Mathieu