search for: ew_incu

Displaying 1 result from an estimated 1 matches for "ew_incu".

2012 Dec 16
3
how to handle NA values in aggregate()
Dear All: I am trying to calculate four columns' means in a dataframe like this: FID MID IID EW_INCU EW_17.5 EMW EEratio 1 4621 TWF2H5 45.26 NA 15.61 NA 1 4621 TWF2H6 48.02 44.09 13.41 0.3041506 2 4630 TWF2H19 51.44 47.81 NA NA 2 4631 TWF2H21 NA 52.72 16.70 0.3167678 2 46...