I am just wondering why what I am showing below might occur. First I have an x data.frame:
> str(x) 'data.frame': 281 obs. of 2 variables: $ x1 : Factor w/ 5 levels "A (50-67%)","B (10-20%)",..: 1 2 5 1 2 5 1 2 5 1 ... $ x2 : num 33.8 60.2 6 76.8 13.8 9.4 76.9 8 15.1 78.1 ... I need to check that for each level of factor x1 the values of x2 are (approximately) contained within a given range. In such a case I will print "ok" a third variable, otherwise I will write "err" ifelse (x$x1 == "A (50-67%)", x$check<-ifelse(x$x2<68&x$x2>49,"ok","xxxx"), x$check<-x$check ) ifelse (x$x1 == "B (10-20%)", x$check<-ifelse(x$x2<21&x$x2>9,"ok","xxxx"), x$check<-x$check ) ifelse (x$x1 == "C (5-15%)", x$check<-ifelse(x$x2<16&x$x2>4,"ok","xxxx"), x$check<-x$check ) ifelse (x$x1 == "D (1-5%)", x$check<-ifelse(x$x2<6&x$x2>0,"ok","xxxx"), x$check<-x$check ) ifelse (x$x1 == "E (10-20%)", x$check<-ifelse(x$x2<21&x$x2>9,"ok","xxxx"), x$check<-x$check ) Now, what I obtain is not always correct - see for instance lines 111, 125, 257, 264, 272, etc in the following output: > x x1 x2 check 1 A (50-67%) 33.8 xxxx 2 B (10-20%) 60.2 xxxx 3 E (10-20%) 6.0 xxxx 4 A (50-67%) 76.8 xxxx 5 B (10-20%) 13.8 ok 6 E (10-20%) 9.4 ok 7 A (50-67%) 76.9 xxxx 8 B (10-20%) 8.0 xxxx 9 E (10-20%) 15.1 ok 10 A (50-67%) 78.1 xxxx 11 E (10-20%) 21.9 xxxx 12 A (50-67%) 96.1 xxxx 13 B (10-20%) 0.6 xxxx 14 E (10-20%) 3.4 xxxx 15 A (50-67%) 88.4 xxxx 16 B (10-20%) 8.8 xxxx 17 E (10-20%) 2.8 xxxx 18 A (50-67%) 93.8 xxxx 19 B (10-20%) 0.0 xxxx 20 E (10-20%) 6.1 xxxx 21 A (50-67%) 81.3 xxxx 22 B (10-20%) 5.1 xxxx 23 E (10-20%) 13.6 ok 24 A (50-67%) 65.9 xxxx 25 B (10-20%) 14.9 ok 26 E (10-20%) 19.1 ok 27 A (50-67%) 81.2 xxxx 28 B (10-20%) 10.2 ok 29 E (10-20%) 8.6 xxxx 30 A (50-67%) 70.2 xxxx 31 B (10-20%) 20.7 ok 32 E (10-20%) 9.2 ok 33 A (50-67%) 61.4 xxxx 34 B (10-20%) 7.3 xxxx 35 E (10-20%) 31.4 xxxx 36 A (50-67%) 77.7 xxxx 37 B (10-20%) 7.9 xxxx 38 E (10-20%) 14.4 ok 39 A (50-67%) 95.0 xxxx 40 B (10-20%) 0.2 xxxx 41 E (10-20%) 4.8 xxxx 42 A (50-67%) 83.3 xxxx 43 B (10-20%) 3.8 xxxx 44 E (10-20%) 12.9 ok 45 A (50-67%) 82.2 xxxx 46 B (10-20%) 6.1 xxxx 47 E (10-20%) 11.7 ok 48 A (50-67%) 91.8 xxxx 49 B (10-20%) 0.6 xxxx 50 E (10-20%) 7.5 xxxx 51 A (50-67%) 83.8 xxxx 52 B (10-20%) 4.0 xxxx 53 E (10-20%) 12.2 ok 54 A (50-67%) 94.6 xxxx 55 B (10-20%) 0.4 xxxx 56 E (10-20%) 5.1 xxxx 57 A (50-67%) 81.4 xxxx 58 B (10-20%) 6.1 xxxx 59 E (10-20%) 12.5 ok 60 A (50-67%) 96.4 xxxx 61 E (10-20%) 3.6 xxxx 62 A (50-67%) 92.0 xxxx 63 B (10-20%) 0.5 xxxx 64 E (10-20%) 7.5 xxxx 65 A (50-67%) 81.8 xxxx 66 B (10-20%) 2.5 xxxx 67 E (10-20%) 15.7 ok 68 A (50-67%) 38.3 xxxx 69 B (10-20%) 5.9 xxxx 70 C (5-15%) 41.5 xxxx 71 D (1-5%) 1.9 xxxx 72 E (10-20%) 12.4 ok 73 A (50-67%) 96.0 xxxx 74 E (10-20%) 4.0 xxxx 75 A (50-67%) 75.9 xxxx 76 B (10-20%) 2.3 xxxx 77 E (10-20%) 21.7 xxxx 78 A (50-67%) 94.9 xxxx 79 E (10-20%) 5.1 xxxx 80 A (50-67%) 96.1 xxxx 81 E (10-20%) 3.9 xxxx 82 A (50-67%) 72.6 xxxx 83 B (10-20%) 9.4 ok 84 C (5-15%) 8.0 xxxx 85 D (1-5%) 2.4 xxxx 86 E (10-20%) 7.5 xxxx 87 A (50-67%) 48.9 xxxx 88 B (10-20%) 2.4 xxxx 89 C (5-15%) 25.0 xxxx 90 D (1-5%) 10.3 ok 91 E (10-20%) 13.3 ok 92 A (50-67%) 87.8 xxxx 93 B (10-20%) 4.1 xxxx 94 C (5-15%) 1.7 xxxx 95 D (1-5%) 0.9 xxxx 96 E (10-20%) 5.6 xxxx 97 A (50-67%) 96.9 xxxx 98 E (10-20%) 3.1 xxxx 99 A (50-67%) 72.2 xxxx 100 B (10-20%) 13.3 ok 101 C (5-15%) 5.7 xxxx 102 D (1-5%) 0.3 xxxx 103 E (10-20%) 8.5 xxxx 104 A (50-67%) 64.1 xxxx 105 B (10-20%) 9.0 xxxx 106 C (5-15%) 9.5 ok 107 D (1-5%) 1.9 xxxx 108 E (10-20%) 15.4 ok 109 A (50-67%) 45.2 xxxx 110 B (10-20%) 15.3 ok 111 C (5-15%) 18.3 ok 112 D (1-5%) 0.3 xxxx 113 E (10-20%) 20.9 ok 114 A (50-67%) 61.5 xxxx 115 C (5-15%) 22.9 xxxx 116 D (1-5%) 10.2 ok 117 E (10-20%) 5.4 xxxx 118 A (50-67%) 69.0 xxxx 119 B (10-20%) 6.1 xxxx 120 C (5-15%) 16.9 ok 121 D (1-5%) 1.0 xxxx 122 E (10-20%) 6.9 xxxx 123 A (50-67%) 61.2 xxxx 124 B (10-20%) 10.3 ok 125 C (5-15%) 5.5 xxxx 126 D (1-5%) 6.9 xxxx 127 E (10-20%) 16.2 ok 128 A (50-67%) 61.1 xxxx 129 B (10-20%) 11.5 ok 130 C (5-15%) 7.0 xxxx 131 D (1-5%) 3.9 xxxx 132 E (10-20%) 16.5 ok 133 A (50-67%) 45.9 xxxx 134 B (10-20%) 24.9 xxxx 135 C (5-15%) 0.2 xxxx 136 D (1-5%) 1.6 xxxx 137 E (10-20%) 27.4 xxxx 138 A (50-67%) 61.5 xxxx 139 B (10-20%) 8.7 xxxx 140 C (5-15%) 22.5 xxxx 141 D (1-5%) 0.1 xxxx 142 E (10-20%) 7.2 xxxx 143 A (50-67%) 64.1 xxxx 144 B (10-20%) 0.9 xxxx 145 C (5-15%) 14.4 ok 146 D (1-5%) 11.2 ok 147 E (10-20%) 9.4 ok 148 A (50-67%) 67.8 xxxx 149 B (10-20%) 11.7 ok 150 C (5-15%) 10.6 ok 151 D (1-5%) 1.3 xxxx 152 E (10-20%) 8.6 xxxx 153 A (50-67%) 65.9 xxxx 154 B (10-20%) 9.9 ok 155 C (5-15%) 11.3 ok 156 D (1-5%) 1.6 xxxx 157 E (10-20%) 11.3 ok 158 A (50-67%) 77.0 xxxx 159 B (10-20%) 5.3 xxxx 160 C (5-15%) 8.6 xxxx 161 D (1-5%) 2.6 xxxx 162 E (10-20%) 6.5 xxxx 163 A (50-67%) 77.5 xxxx 164 B (10-20%) 5.7 xxxx 165 C (5-15%) 8.1 xxxx 166 D (1-5%) 4.6 xxxx 167 E (10-20%) 4.2 xxxx 168 A (50-67%) 40.1 xxxx 169 B (10-20%) 12.9 ok 170 C (5-15%) 33.2 xxxx 171 D (1-5%) 0.3 xxxx 172 E (10-20%) 13.6 ok 173 A (50-67%) 53.9 xxxx 174 B (10-20%) 10.1 ok 175 C (5-15%) 8.4 xxxx 176 D (1-5%) 4.2 xxxx 177 E (10-20%) 23.4 xxxx 178 A (50-67%) 94.3 xxxx 179 C (5-15%) 1.7 xxxx 180 E (10-20%) 4.0 xxxx 181 A (50-67%) 62.1 xxxx 182 B (10-20%) 12.3 ok 183 C (5-15%) 5.3 xxxx 184 D (1-5%) 7.3 xxxx 185 E (10-20%) 13.0 ok 186 A (50-67%) 49.2 xxxx 187 B (10-20%) 14.1 ok 188 C (5-15%) 7.9 xxxx 189 D (1-5%) 8.9 xxxx 190 E (10-20%) 20.0 ok 191 A (50-67%) 63.6 xxxx 192 B (10-20%) 10.4 ok 193 C (5-15%) 11.9 ok 194 D (1-5%) 2.4 xxxx 195 E (10-20%) 11.7 ok 196 A (50-67%) 55.1 xxxx 197 B (10-20%) 13.5 ok 198 C (5-15%) 11.2 ok 199 D (1-5%) 4.8 xxxx 200 E (10-20%) 15.5 ok 201 A (50-67%) 68.6 xxxx 202 B (10-20%) 3.1 xxxx 203 C (5-15%) 8.2 xxxx 204 D (1-5%) 9.2 ok 205 E (10-20%) 10.8 ok 206 A (50-67%) 45.0 xxxx 207 B (10-20%) 4.8 xxxx 208 C (5-15%) 7.1 xxxx 209 D (1-5%) 4.9 xxxx 210 E (10-20%) 38.2 xxxx 211 A (50-67%) 85.2 xxxx 212 B (10-20%) 3.1 xxxx 213 C (5-15%) 4.4 xxxx 214 D (1-5%) 0.4 xxxx 215 E (10-20%) 6.9 xxxx 216 A (50-67%) 60.5 xxxx 217 B (10-20%) 10.1 ok 218 C (5-15%) 11.1 ok 219 D (1-5%) 1.8 xxxx 220 E (10-20%) 16.5 ok 221 A (50-67%) 58.7 xxxx 222 B (10-20%) 7.0 xxxx 223 C (5-15%) 10.5 ok 224 D (1-5%) 5.2 xxxx 225 E (10-20%) 18.7 ok 226 A (50-67%) 90.0 xxxx 227 C (5-15%) 5.6 xxxx 228 D (1-5%) 0.7 xxxx 229 E (10-20%) 3.8 xxxx 230 A (50-67%) 62.5 xxxx 231 B (10-20%) 13.7 ok 232 C (5-15%) 9.7 ok 233 D (1-5%) 2.6 xxxx 234 E (10-20%) 11.6 ok 235 A (50-67%) 55.6 xxxx 236 B (10-20%) 17.6 ok 237 C (5-15%) 11.8 ok 238 D (1-5%) 2.6 xxxx 239 E (10-20%) 12.4 ok 240 A (50-67%) 85.2 xxxx 241 B (10-20%) 0.6 xxxx 242 C (5-15%) 2.1 xxxx 243 D (1-5%) 2.3 xxxx 244 E (10-20%) 9.8 ok 245 A (50-67%) 87.4 xxxx 246 B (10-20%) 0.4 xxxx 247 C (5-15%) 2.9 xxxx 248 D (1-5%) 2.8 xxxx 249 E (10-20%) 6.4 xxxx 250 A (50-67%) 73.0 xxxx 251 B (10-20%) 4.0 xxxx 252 C (5-15%) 15.6 ok 253 D (1-5%) 0.7 xxxx 254 E (10-20%) 6.7 xxxx 255 A (50-67%) 90.4 xxxx 256 C (5-15%) 2.4 xxxx 257 D (1-5%) 2.5 xxxx 258 E (10-20%) 4.7 xxxx 259 A (50-67%) 64.3 xxxx 260 B (10-20%) 6.6 xxxx 261 C (5-15%) 13.3 ok 262 D (1-5%) 3.5 xxxx 263 E (10-20%) 12.3 ok 264 A (50-67%) 65.5 xxxx 265 B (10-20%) 13.5 ok 266 C (5-15%) 4.6 xxxx 267 D (1-5%) 0.9 xxxx 268 E (10-20%) 15.4 ok 269 A (50-67%) 72.1 xxxx 270 B (10-20%) 6.4 xxxx 271 C (5-15%) 12.7 ok 272 D (1-5%) 1.1 xxxx 273 E (10-20%) 7.7 xxxx 274 A (50-67%) 71.4 xxxx 275 B (10-20%) 0.9 xxxx 276 C (5-15%) 21.9 xxxx 277 E (10-20%) 5.7 xxxx 278 A (50-67%) 53.0 xxxx 279 B (10-20%) 3.6 xxxx 280 C (5-15%) 36.4 xxxx 281 E (10-20%) 7.0 xxxx Can anyone explain why this might occur? Thanks, Luca Luca Meyer www.lucameyer.com IBM SPSS Statistics release 19.0.0 R version 2.12.1 (2010-12-16) Mac OS X 10.6.5 (10H574) - kernel Darwin 10.5.0 [[alternative HTML version deleted]] ______________________________________________ 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.