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mdist
2009 Sep 06
2
selecting columns based on values of two variables
Dear R-list,
I am having troubles selecting rows from a very large data-set
containing distances between capitals.
The structure of the data-set looks like this:
numa ida numb idb kmdist midist
1 2 USA 20 CAN 731 456
2 2 USA 31 BHM 1623 1012
3 2 USA 40 CUB 1813 1130
I want to select a subset of these dyads, and have tried the following
code:
subset(capdist,ida == c("DEN","SWD","FIN") &...