[R] Premature termination of script

[Patrick Burns]

You can use 'stop' instead of  'cat' -- in which case you
don't need the newline at the end of the string.

But I suspect you would be better off writing a function
rather than a script.  S Poetry is one of many sources on
writing functions.

Patrick Burns
patrick at burns-stat.com
+44 (0)20 8525 0696
http://www.burns-stat.com
(home of S Poetry and "A Guide for the Unwilling S User")

Marco Blanchette wrote:

>I am fairly new to R and I am writing a script that would take a file, as an
>input, and generates a bunch of graphs out of it. My first task is to be
>sure that the file is of the right type by looking if there is a valid
>barcode in it as in (the barcode is beetween a double and single
>underscore):
>
>library(tkWidgets)
>
>##############
>#Loading a file
>#testing if valid if not kill the execution
>##############
>data.file <- fileBrowser(textToShow="Select a splice junction array
>extraction file")
>if ( t <- regexpr("__\\d*_",data.file, perl=T) == -1){
>    cat ("The selected file does not seem to be of the right type\n")
>    #Should be able to exit the script here
>}
>cat("File look good keep going\n")
>
>How do I prevent R from interpreting the rest of the script if the user
>don't input the right file?
>
>
>
>
>Marco Blanchette, Ph.D.
>
>mblanche at uclink.berkeley.edu
>
>Donald C. Rio's lab
>Department of Molecular and Cell Biology
>16 Barker Hall
>University of California
>Berkeley, CA 94720-3204
>
>Tel: (510) 642-1084
>Cell: (510) 847-0996
>Fax: (510) 642-6062
>
>______________________________________________
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>
>
>
>  
>