r - How to select a subset of rows and columns from a data.frame -

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I have it 

  d [d $ age & gt; "2",]

And it gives all the rows on which the age is greater than 2 but I only want to return the value in some columns, d $ x and

thanks

itemprop = "text"> 

  d [d $ age & Gt; "2", c ("x", "y")]

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