The results of str(data) are:
str(data)
'data.frame': 930 obs. of 14 variables: $ NEST : Factor w/ 627 levels "#10 Treesbank",..: 2 7 9 42 43 45 48 67 73 81 ... $ LONG : num -101 -111 -111 -112 -112 ... $ NG : num 0.34 0.8 0.82 0.6 0.7 0.54 0.05 0 0.95 0.3 ... $ DM : int 1 1 1 1 1 1 1 1 1 1 ... $ GDD : num 752 758 715 639 639 ... $ PREC : num 221.3 142.9 68.7 186.9 185.9 ... $ SNOW : num 27.8 14.1 35 19.2 19.2 ... $ GDDT1 : num 2201 2278 2206 2106 2105 ... $ PRECT1: num 271 249 276 222 221 ... $ SNOWT1: num 36.7 17.2 14.1 34.3 34.2 ... --------------- Leanne Heisler Graduate Student Department of Biology University of Regina