R: table formating
===

I have an excel file with the following columns

    Column1  Column2  Column3
    ab        bb        0.5
    ab        bc        0.1  
    ab        cd        0.7
    ab        dd        0.8
    ac        bb        0.2
    ac        bg        0.8
    ac        ee        0.8
    ac        dd        0.3


> x <- data.frame ("column1"=c("ab","ab","ab","ab","ac","ac","ac","ac"), "column2"=c("bb","bc","cd","dd","bb","bg","ee","dd"),"column3"=c(0.5, 0.1, 0.7, 0.8, 0.2, 0.8, 0.8, 0.3))

I want to change it do.

        ab   ac
    bb  0.5  0.2
    bc  0.1  
    cd  0.7
    dd  0.8  0.3
    bg       0.8
    ee       0.8

