[R] How to read in data

[James MacDonald]

You probably need to change the directory to the one that contains the
text file you are reading in. This is done under the File menu.

Jim



James W. MacDonald
Affymetrix and cDNA Microarray Core
University of Michigan Cancer Center
1500 E. Medical Center Drive
7410 CCGC
Ann Arbor MI 48109
734-647-5623

>>> "Anne Piotet" <Anne.Olga.Piotet at omsv.vd.ch> 08/15/03 10:42AM >>>
Hello,
I'm new to R and in the process of testing it
My first question: I fail to read in my data (ANSI toto.txt file, tab
separated)
            > test <-read.table("toto.txt")
            Error in file(file, "r") : unable to open connection
            In addition: Warning message: 
            cannot open file `toto.txt'
            > test <- scan("C:\\toto.txt")
            Error in scan("C:\\toto.txt") : "scan" expected a real, got
"No_D"
            > test <-scan("test.dat")
            Error in file(file, "r") : unable to open connection
            In addition: Warning message: 
            cannot open file `toto.txt
(and no, it is not read only or locked or whatever) I use Windows
2000/XP 

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

Well thank for the help
Anne

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