subset error message
Shravan Vasishth wrote:
Hello everybody,
I'm trying to subset a data frame "foo", which looks like this:
sent cond raw V1
10 2 A 614 7
11 2 A 724 6
12 2 A 641 5
13 2 A 665 9
33 5 B 510 7
34 5 B 659 7
35 5 B 607 6
37 5 B 467 8
38 5 B 586 9
39 5 B 523 10
57 8 C 858 8
58 8 C 513 9
59 8 C 739 7
60 8 C 699 7
61 8 C 585 4
79 11 D 485 8
80 11 D 704 8
81 11 D 544 7
82 11 D 461 7
83 11 D 838 8
84 11 D 655 13
85 11 D 568 6
107 15 A 467 7
108 15 A 680 7
110 15 A 741 8
130 19 B 686 7
131 19 B 717 6
132 19 B 495 8
133 19 B 480 4
134 19 B 376 7
135 19 B 470 9
148 21 C 443 6
149 21 C 771 8
150 21 C 790 8
151 21 C 653 8
152 21 C 547 7
173 25 D 550 7
174 25 D 444 7
175 25 D 491 8
176 25 D 1038 7
177 25 D 1003 9
178 25 D 661 13
179 25 D 645 10
193 28 A 652 7
194 28 A 846 6
195 28 A 571 5
196 28 A 467 8
197 28 A 597 10
206 31 B 474 7
207 31 B 534 7
208 31 B 545 7
209 31 B 610 5
210 31 B 443 8
211 31 B 454 12
212 31 B 420 10
231 35 C 549 7
232 35 C 527 6
233 35 C 408 7
234 35 C 394 8
235 35 C 396 10
244 37 D 574 8
245 37 D 711 8
246 37 D 457 8
247 37 D 556 6
248 37 D 399 8
249 37 D 425 13
250 37 D 371 7
259 39 A 644 6
260 39 A 872 8
262 39 A 1685 9
278 42 B 551 6
279 42 B 611 7
280 42 B 672 8
281 42 B 650 4
282 42 B 576 9
283 42 B 559 14
305 46 C 566 9
306 46 C 433 6
307 46 C 315 6
308 46 C 1088 9
309 46 C 463 6
320 48 D 481 6
321 48 D 642 8
322 48 D 548 8
323 48 D 507 7
324 48 D 406 9
325 48 D 380 13
When I do
subset(foo, V1 > 5)
(I.e., when I try to remove all rows with values 5 or less in column V1) I get this error message: Warning message: ">" not meaningful for factors in: Ops.factor(V1, 5)
The reason for the error is what R tells you: V1 is a factor (and not numeric) and therefore ">" is not meaningful. If V1 is not a factor you should change it to a numeric vector and use the command above. Or you could do something like subset(foo, levels(V1) > 5) which should give the desired result. Z
I have the same problem with ">". However, it works fine if I do:
subset(foo, V1 != 1 & V1 != 2 & V1 != 3 & V1 != 4 & V1 != 5)
If I try the same thing with the airquality example in the help (?subset), the inequality works fine:
subset(airquality, Temp > 80)
... Thanks in advance, -- Shravan Vasishth Dept. of Linguistics, OSU 222 Oxley Hall, 1712 Neil Ave. Columbus, OH 43210-1298 USA URL: http://ling.ohio-state.edu/~vasishth -.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.-.- r-help mailing list -- Read http://www.ci.tuwien.ac.at/~hornik/R/R-FAQ.html Send "info", "help", or "[un]subscribe" (in the "body", not the subject !) To: r-help-request at stat.math.ethz.ch _._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._._
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