[R] Return the indices of rows of a data frame

[Bert Gunter]

There are many good R tutorials on the web. Some recommendations can
be found here:

https://www.rstudio.com/online-learning/#R

Please spend some time learning fundamental R constructs and
functionality before posting what appear to be very basic questions
here.

Cheers,
Bert


Bert Gunter

"The trouble with having an open mind is that people keep coming along
and sticking things into it."
-- Opus (aka Berkeley Breathed in his "Bloom County" comic strip )


On Mon, Sep 19, 2016 at 8:37 PM, John <miaojpm at gmail.com> wrote:
> Hi,
>
>    I have the following dataframe:
>
>> temp<-data.frame(a=c(1,1,2), b=2:4, c=1:3)
>> row.names(temp)<-c("D", "E", "F")
>> temp
>   a b c
> D 1 2 1
> E 1 3 2
> F 2 4 3
>
>    I would like R to tell me which rows has value "a" equal to 1. The
> answer is the first row and the second row, or row D and row E. Which
> function should i use? function subset? function which?
>
>    Thanks!
>
>         [[alternative HTML version deleted]]
>
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