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
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