[R] Skip NA and alter length

[Syed Abid Hussaini]

Thanks!! That did solve my problem. I am loving it.

--- Dimitris Rizopoulos <dimitris.rizopoulos at med.kuleuven.be> wrote:

> try this:
> 
> mat <- matrix(1:25, 5, 5)
> mat[sample(25, 3)] <- NA
> #########
> mat
> colSums(!is.na(mat))
> 
> 
> I hope it helps.
> 
> Best,
> Dimitris
> 
> ----
> Dimitris Rizopoulos
> Ph.D. Student
> Biostatistical Centre
> School of Public Health
> Catholic University of Leuven
> 
> Address: Kapucijnenvoer 35, Leuven, Belgium
> Tel: +32/(0)16/336899
> Fax: +32/(0)16/337015
> Web: http://med.kuleuven.be/biostat/
>      http://www.student.kuleuven.be/~m0390867/dimitris.htm
> 
> 
> ----- Original Message ----- 
> From: "Syed Abid Hussaini" <ohitsabid at yahoo.com>
> To: <r-help at stat.math.ethz.ch>
> Sent: Wednesday, November 29, 2006 4:58 PM
> Subject: [R] Skip NA and alter length
> 
> 
> > Hi,
> >
> > This is my first post.
> >
> > Problem:
> >
> > I have a matrix 5 by 5 and it has 3 NAs in them. Now, when i use 
> > length () for a particular column
> > which has NA it returns 5. I know this is true, but how do i change 
> > my matrix such that the length
> > becomes 5 minus the number of NAs i have. I know NA has a length of 
> > 1, but then how do i convert
> > the NA into NULL whose length is 0.
> >
> > Thanks in advance.
> >
> > abid
> >
> > ______________________________________________
> > R-help at stat.math.ethz.ch mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide 
> > http://www.R-project.org/posting-guide.html
> > and provide commented, minimal, self-contained, reproducible code.
> > 
> 
> 
> Disclaimer: http://www.kuleuven.be/cwis/email_disclaimer.htm
> 
>