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2010 Feb 01
3
merging data frames gives all NAs
Dear kind R helpers,
I have a vector of runway names in rwy ("31R", "31L",... the number is
user selectable)
arrgnd is a data frame with data for all flights and all runways, with a
Runway column.
I am trying to subset arrgnd into a dat frame for each selected runway,
and then combine them back together using the following code:
for (j in 1:nr) { # nr = number of user-selected runways
ar4rw = arrgnd[a...