On Sun, 5 Feb 2023 19:37:03 +0530
Upananda Pani <upananda.p...@gmail.com> wrote:
> Dear All,
>
> I want to create a vector p and extract first 20 observations using
> subset function based on logical condition.
>
> My code is below
>
> p <- 0:100
>
> I know i can extract the first 20 observations using the following
> command.
>
> q <- p[1:20]
>
> But I want to extract the first 20 observations using subset function
> which requires a logical condition. I am not able to frame the
> logical condition.
>
> The code should be
>
> q <- subset(p, logical condition)
>
> I am not able to do it. Please let me know what you think.
I think that you are manufacturing an unnecessary difficulty. If you
want the first 20 entries of p, use p[1:20]!!!
However, if you obdurately *insist* on using subset() you could do
subset(p,(1:length(p)) <= 20)
This works, but makes a mountain out of a molehill.
cheers,
Rolf Turner
--
Honorary Research Fellow
Department of Statistics
University of Auckland
Stats. Dep't. phone: +64-9-373-7599 ext. 89622
Home phone: +64-9-480-4619
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