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371124
2016 Aug 21
1
'droplevels' inappropriate change
In R devel r71124, if 'x' is a factor, droplevels(x) gives
factor(x, exclude = NULL) .
In R 3.3.1, it gives
factor(x) .
If a factor 'x' has NA and levels of 'x' doesn't contain NA, factor(x) gives the expected result for droplevels(x) , but factor(x, exclude = NULL) doesn't. As I sai...