[R] how to view only readings of a selected data from a column while the other columns remain

[Rui Barradas]

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Rui Barradas
Em 15-09-2012 10:22, kangam3 escreveu:
> Hi Friends
>
> I am new here and have a problem
>
>    Year       Market         Winner          BID
> 1  1990        ABC             Apple          0.1260
> 2  1990        ABC             Apple         0.1395
> 3  1990        EFG             Pear           0.1350
> 4  1991        EFG             Apple         0.1113
> 5  1991        EFG            Orange          0.1094
>
>
> For each year and separately for the two markets (i.e.,ABC,EFG), examine the
> combined data for Apple and Pear on the bid price variable BID for presence
> of potential outliers.5 Identify instances where you observe the presence of
> potential outliers.
>
> I managed to separate the data by year only
>
> y <- c(1, seq(300))
>> year1991 <- subset(X, y < 39)
>> year1991
> Year1991 <- year1991[, c(1,2,3,5)]
>> Year1991
> now I need help on whats the right R command to key to select(View) only ABC
> of the Market COLUMN, which the other column values remains.
>
> Is it possible to do multiple  separation at one time? or step by step
>
> Kindly advise :)
>
>
>
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