[R] make a right subset!

[Ulrik Stervbo]

Hi Elahe,

Use subset and the %in% operator:

subset(df2, Serial %in% Matched)[["Count "]]

Best wishes,
Ulrik

On Thu, 7 Jul 2016 at 13:37 ch.elahe via R-help <r-help at r-project.org>
wrote:

> Hi all,
> I have 2 data frames like the following:
> the first one df1:
>
>     'data.frame':  141obs. of 1 variable:
>     $SerialNum: int 41006 41013 41044 41046 41067 41166 41202 41262 41274
> 41290
> and the second one df2:
>
>     'data.frame':  194 obs. of 2 variables:
>     $Serial: int   41006 41013 41018 41044 41046 41067 41111 41200 41262
> 41331
>     $Count : int   1 10 103 11 12 13 138 14 15 16 169 18 182 2 20 21  224
> 226
> then I find the intersect of two data frames in serials which is:
>
>     Matched=intersect(df1$SerialNum,df2$Serial)
> which gives me matched serials in both data frames. Next I want to get
> Count of these matched serials from df2 but I don't know how to make the
> right subset for this! Does anyone know how should I do that?
> Thanks for any help,
> Elahe
>
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