While you study the documentation as others suggested, may I suggest that you
take a look at the
file.exists()
function. Here is an example of using file.exists().
tmpfile <- define()
if (file.exists(tmpfile)) {
## read the file
} else {
## tell the user to try again
}
On Jul 24, 2011, at
stop even if user writes wrong name of input file?
Thanking you,
Warm Regards
Vikas Bansal
Msc Bioinformatics
Kings College London
From: Bert Gunter [gunter.ber...@gene.com]
Sent: Sunday, July 24, 2011 3:58 PM
To: Bansal, Vikas
Cc: r-help@r-project.org
Subje
rg
Subject: Re: [R] wrong name of input file and goto like function
These are elementary programming constructs. I would suggest you take
a look at an online basic (as in elementary, not the Basic language)
programming tutorial to see how to do this sort of thing. R does it
like many other language
These are elementary programming constructs. I would suggest you take
a look at an online basic (as in elementary, not the Basic language)
programming tutorial to see how to do this sort of thing. R does it
like many other languages (with ?for, ?while, ?if, etc.).
-- Bert
On Sun, Jul 24, 2011 at
Dear all,
I have a question and need your help please.
I have the following code which is asking user to enter the name of their file.
define<- function()
{
readline("enter the name of your file: ")
}
df=read.table(define(),fill=T,sep="\t",colClasses = "character")
Now I want if user wil
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