[R] Extracting data using subset function

[Rui Barradas]

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, <andresgc using 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
>>
>> 	[[alternative HTML version deleted]]
>>
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>> and provide commented, minimal, self-contained, reproducible code.
>>
>> --
>> * Andrés González Carmona *
>>
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
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> PLEASE do read the posting guide http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
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