[R] work with a subset of the dataset

[R. Michael Weylandt]

You can probably do it more easily with the subset() function but in
my experience that often leads to more problems than solutions:
perhaps try this.

idx <- with(DATA, which(age > 20 & age < 30))
DATA[idx, ]

Michael

On Thu, Jan 12, 2012 at 5:25 PM, manu79 <manuelespino79 at hotmail.it> wrote:
> Hello,
> I have a big dataset with many variables and I would like to consider only
> the rows in which there is a specific value of a variable.
>
> I make an example for explain what I mean:
> I have 5 variables describing a person: age, sex, weight, colour of hair,
> colour of eyes.
> I have 1000 rows (1000 persons) and I want to consider only the persons
> whose age is between 20 to 30. How can I do?
>
> Thank you very much
> M.
>
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