[R] select value from a column depending on a value in another column

[tornanddesperate]

Hi everybody

I couldn't find the solution to what must be quite a simple problem. Maybe
you can help?

       treatment session period stage wage_accepted market
1      1            1         1        1       25                  public
2      1            1         1        1       19                  privat
3      1            1         1        1       15                  public
4      1            1         1        2       32                  public
5      1            1         1        2       13                  privat

>From this table, I'd like to choose only those values in the column
"wage_accepted" that have the value "public" in the column "market". How can
I do this? 

Is there a good general help site for R that would explain basic table
manipulations such as this?

Thank you very much for your help



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