> > question like this: > > I have data tag and phi, when tag are the same, then phi are the same. like > below, tag have value 1 2 3 4 and phi have value .9 .3 1 0. > > my question is, how can I get the result like > tag=c(1,2,3,4) and corresponding phi=c(.9,.3,1,0) > > tag phi > 2 .3 > 1 .9 > 2 .3 > 3 1 > 2 .3 > 1 .9 > 3 1 > 4 0 > 1 .9 > 2 .3 > > tag=c(2,1,2,3,2,1,3,4,1,2) > phi=c(.3,.9,.3,1,.3,.9,1,0,.9,.3) >
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