subsetting a dataset

[bdossman]

Hi

I am a beginner R user and need a little help with the subset function.

I have a dataset with  columns; TOWER,TAG.ID, DATETIME (POSIXct class) and I would like to subset my data by specific TAG.ID (e.g TAG.IDs 12:20 and 192:212). Is there an easy way to preform this operation?

Thanks
Bryant

[Rui Barradas]

Hello,

Try the following.

ix <- with(dataset, TAG.ID %in% 12:20 | TAG.ID %in% 192:212)
dataset[ix, ]

or

ix <- with(dataset, (12 <= TAG.ID & TAG.ID <=20) | (192 <= TAG.ID &
TAG.ID <= 212))

if the variable is not integer.

Also, read the manual, this, index vectors, is there. (R-intro.pdf).

Hope this helps,

Rui Barradas

Em 24-06-2012 13:31, bdossman escreveu:

> Hi
>
> I am a beginner R user and need a little help with the subset function.
>
> I have a dataset with  columns; TOWER,TAG.ID, DATETIME (POSIXct class) and I
> would like to subset my data by specific TAG.ID (e.g TAG.IDs 12:20 and
> 192:212). Is there an easy way to preform this operation?
>
> Thanks
> Bryant
>
>
>
>
> --
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