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obtaining a true/false vector with combination of strsplit, length, unlist,
2012 Feb 11
2
obtaining a true/false vector with combination of strsplit, length, unlist,
Hi, A pared down version of the dataset I'm working with: edm<-read.table(textConnection("WELLID X_GRID Y_GRID LAYER ROW COLUMN SPECIES CALCULATED OBSERVED w301_3 4428. 1389 2 6 18 1 3558 6490. w304_12 4836. 6627 2 27 20 1 3509 3228. 02_10_12080 3.6125E+04 13875 1 56 145 1 2774 -999.0 02_10_12080 3.6125E+04 13875 1 56 145 1 2774 -999.0 02_10_12081 3.6375E+04 13875 1 56 146 1 3493 -9...