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using
2007 Aug 28
1
subcripts on data frames (PR#9885)
...type:
=20
worms<-read.table("c:\\temp\\worms.txt",header=3DT)
attach(worms)
names(worms)
[1] "Field.Name" "Area" "Slope" "Vegetation"
"Soil.pH"=20=20=20=20=20
[6] "Damp" "Worm.density"
=20
Usinng "not duplicated" I get two rows for Meadow and none for Scrub
=20
worms[rev(order(Worm.density)),] [!duplicated(Vegetation),]
Field.Name Area Slope Vegetation Soil.pH Damp Worm.density
9 The.Orchard 1.9 0 Orchard 5.7 FALSE 9
16 Water.Meadow 3.9 0...