[R] Data-frame selection

[Jeff Newmiller]

Sorry, looked like there were a different number of rows in the results because the rownames were different. I also see that the OP was interested in any Groups, not just the two in the example, so your solution probably meets the requirements better than mine 

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Sent from my phone. Please excuse my brevity.

On October 10, 2015 5:40:37 PM PDT, peter dalgaard <pdalgd at gmail.com> wrote:
>
>> On 11 Oct 2015, at 02:12 , Jeff Newmiller <jdnewmil at dcn.davis.ca.us>
>wrote:
>> 
>> Sorry I missed the boat the first time, and while it looks like Peter
>is getting closer I suspect that is not quite there either due to the
>T2 being considered separate from T3 requirement.
>
>Er, what do you mean by that? 
>
>As far as I can tell, we're selecting the same observations:
>
>> teste[kp,]
>   ID Group  Var
>1   3    T2 0.32
>2   4    T3 1.59
>3   1    T2 2.94
>4   1    T2 3.23
>5   1    T2 1.40
>6   1    T2 1.62
>7   1    T2 2.43
>8   1    T2 2.53
>9   1    T2 2.25
>10  1    T3 1.66
>11  1    T3 2.86
>12  1    T3 0.53
>13  1    T3 1.66
>14  1    T3 3.24
>15  1    T3 1.34
>21  2    T2 2.00
>22  2    T2 2.39
>23  2    T2 1.65
>24  2    T2 2.05
>25  2    T2 2.75
>26  2    T2 2.23
>27  2    T2 1.39
>28  2    T2 2.66
>29  2    T2 1.05
>30  2    T3 2.52