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duplicated
2012 Jul 23
1
duplicated() variation that goes both ways to capture all duplicates
...02 5.8 2.7 5.1 1.9 virginica
143 5.8 2.7 5.1 1.9 virginica
Unfortunately this is unnecessarily long and convoluted. Short of a
'bothWays' argument in duplicated(), I came up with a small wrapper
that simplifies the above:
duplicated2 <-
function(x, bothWays=TRUE, ...)
{
if(!bothWays) {
return(duplicated(x, ...))
} else if(bothWays) {
return((duplicated(x, ...) | duplicated(x, fromLast=TRUE, ...)))
}
}
Now the above can be achieved simply via:
> iris[duplica...