On 4/3/2013 4:33 AM, Naser Jamil wrote:
> Dear R-user,
> May I seek your suggestion.  I have a data file 'stop' to be scanned in R.
> But I want to ignore one specific number '21' there. Putting differently, I
> want to get all numbers in the file except 21. Is there any command to
> achieve it?
>
> --------------------------------------------------------------
>
> b<-scan("F:\\stop.txt")
>
> --------------------------------------------------------------
Well, I don't know what is in stop.txt, but I will assume  it is a 
string of numbers or strings separated by the end of line character and 
then a terminating EOL.  Read it in as you have it and then:
b <- b[-21]

If you are reading in a dataframe, simply use what you have and then do:
b <- b[-21, ]

and you should have what you want, or perhaps you want
b[21, ] <-  NA  # indicate row 21 as a missing value


> Many thanks for your kind attention.
>
> Regards,
> Jamil.
>
>
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-- 

Robert W. Baer, Ph.D.
Professor of Physiology
Kirksille College of Osteopathic Medicine
A. T. Still University of Health Sciences
Kirksville, MO 63501 USA


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