[R] Asking Favor For "Remove element with Particular Value In Vector"

[David Winsemius]

On Aug 27, 2011, at 5:31 AM, chuan_zl wrote:

> Dear All.
>
> I am Chuan. I am beginner for R.I facing some problem in remove  
> element from
> vector.I have a vector with size 238 element as follow(a part)
>
> [1] 0 18 24 33 44..................................[238] 255
>
> Let the vector label as "x",I want remove element "0" and "255".I  
> try use
> such function:
>
> x[x>0 & x<255]

I am not completely clear but it appears that you want to remove the  
first and last elements. You can use negative indexing vectors.

x[ -c(1, length(x) ) ]


>
> However, I am fail

Perhaps your vector is a factor? Try this and see what you get:

str(x)


> since same results are give even try it for many times.I
> also try with shorter vector with 10 element. It is successfully  
> resulted.
> So,want can I do for it. Kindly asking favor for expert here. Thank  
> you very
> much.
>
> Chuan
>
> --


David Winsemius, MD
West Hartford, CT