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2003 Sep 22
1
Managing a list with a list
...mmary(tf)
Length Class Mode
id 10 -none- numeric
x 10 -none- numeric
y 10 -none- numeric
A 10 -none- numeric
NegB 10 -none- numeric
K 10 -none- numeric
Age 10 -none- numeric
DBH 10 -none- numeric
Living 10 -none- logical
pSeed 10 -none- list
TCI 10 -none- numeric
STA 10 -none- numeric
Here are the living trees.
> tf$Living
[1] FALSE TRUE TRUE TRUE TRUE TRUE TRUE FALSE TRUE TRUE
So, here are the ids of the trees I want to retain.
> tf$id[tf$Living == T]
[1] 2 3 4 5 6 7 9 10...