Hi I have a data.frame with 371,718 obs. of 12 variables (see below for an str). My problem is with V1, a Factor w/ 93144 levels, there should actually be 93994 levels. Each entry looks like: comp[number]_c[number]_seq[number] for example comp215489_c0_seq40 R is grouping as though the last number is a decimal for some reason, in other words comp215489_c0_seq40 and comp215489_c0_seq4 are considered to be the same. My problem is that they are not the same so when I group by this factor I am losing 800 levels.
Here is an str 'data.frame': 371718 obs. of 12 variables: $ V1 : Factor w/ 93144 levels "comp100000_c0_seq1",..: 92271 91685 29 30 1564 1564 1623 91700 91701 91848 ... $ V2 : Factor w/ 17162 levels "gi|345842331|ref|NM_001244016.1|",..: 10119 10779 13210 13210 11522 8115 13079 14493 14493 15858 ... $ V3 : num 95.5 90.2 98.7 99.2 81.4 ... $ V4 : int 335 153 237 122 258 127 306 258 120 177 ... $ V5 : int 15 15 3 1 38 19 20 23 5 9 ... $ V6 : int 0 0 0 0 4 2 0 0 0 0 ... $ V7 : int 1 45 1 43 1 129 1 54 1 70 ... $ V8 : int 335 197 237 164 254 254 306 311 120 246 ... $ V9 : int 6866 18 3172 3438 67 122 3927 42 346 195 ... $ V10: int 7200 170 3408 3559 318 247 4232 299 465 19 ... $ V11: num 7e-155 2e-46 4e-125 2e-61 3e-24 ... $ V12: num 545 184 446 234 111 69.9 448 329 198 280 .. -- View this message in context: http://r.789695.n4.nabble.com/problem-with-factor-levels-tp4652006.html Sent from the R help mailing list archive at Nabble.com. ______________________________________________ R-help@r-project.org mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide http://www.R-project.org/posting-guide.html and provide commented, minimal, self-contained, reproducible code.