Às 22:14 de 05/02/2023, Rui Barradas escreveu:
Às 19:33 de 05/02/2023, Upananda Pani escreveu:
Thank you. It means we can not use the subset function here.
Regards
On Mon, 6 Feb, 2023, 00:53 Andrés González Carmona, <andre...@ugr.es>
wrote:
From ?subset:
Warning
This is a convenience function intended for use interactively. For
programming it is better to use the standard subsetting functions like [
<http://127.0.0.1:21786/library/base/help/%5B>, and in particular the
non-standard evaluation of argument subset can have unanticipated
consequences.
El 05/02/2023 a las 15:07, Upananda Pani escribió:
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.
Best regards,
Upananda
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Hello,
Yes you can:
subset(p, p %in% 1:20)
# [1] 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20
Hope this helps,
Rui Barradas
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R-help@r-project.org mailing list -- To UNSUBSCRIBE and more, see
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PLEASE do read the posting guide
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and provide commented, minimal, self-contained, reproducible code.
Hello,
But a much more natural the *first* n observations is with function head.
head(p, n = 20)
# [1] 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19
Hope this helps,
Rui Barradas
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