Hi Use drop=TRUE argument in interaction for removing unused levels.
Petr > -----Original Message----- > From: r-help-boun...@r-project.org [mailto:r-help-bounces@r- > project.org] On Behalf Of Adel ESSAFI > Sent: Wednesday, May 08, 2013 12:48 PM > To: r-help > Subject: Re: [R] R prints empty group on my figure!! > > hello, > I attach the figure generated by R: > > > 2013/5/8 Adel ESSAFI <adeless...@gmail.com> > > > Hello list > > I am trying to solve a problem when drawing a figure related to the > > dataframe below. > > I draw V6 in Y axes and V3 as X axes. The data are grouped by V1 AND > V2. > > I use this commande to make it: > > > > > xyplot(cm[,6]~cm[,3],type="b",group=interaction(cm[,1],cm[,2],sep="/") > > , auto.key =list( title="Makespan en fonction de beta", points = > > FALSE, columns=2, lines = TRUE) > > ,data=cm,xlab=expression(beta),ylab="Ratio") > > > > The problem is that, R puts (for example) the entry C/D in the > legend, > > however, I have no such entry. Note that R it does not draw a line > for > > that entry. > > > > So, the question : how to do to remove the empty groups from the > legend. > > > > Cordially > > > > > > > > > > > cm > > V1 V2 V3 V4 V5 V6 > > 1 C L 0.0 732179.0 686983 1.065789 > > 2 C L 0.2 900956.4 686983 1.311468 > > 3 C L 0.4 964725.0 686983 1.404292 > > 4 C L 0.6 1017984.0 686983 1.481818 > > 5 C L 0.8 1064745.8 686983 1.549887 > > 6 C L 1.0 1107269.0 686983 1.611785 > > 7 C S 0.0 803926.0 686983 1.170227 > > 8 C S 0.2 1020492.0 686983 1.485469 > > 9 C S 0.4 1134818.0 686983 1.651887 > > 10 C S 0.6 1223596.0 686983 1.781115 > > 11 C S 0.8 1322548.8 686983 1.925155 > > 12 C S 1.0 1395714.0 686983 2.031657 > > 13 I L 0.0 2628113.0 686983 3.825587 > > 14 I L 0.2 2628113.0 686983 3.825587 > > 15 I L 0.4 2628113.0 686983 3.825587 > > 16 I L 0.6 2628113.0 686983 3.825587 > > 17 I L 0.8 2628113.0 686983 3.825587 > > 18 I L 1.0 2628113.0 686983 3.825587 > > 19 I S 0.0 2628113.0 686983 3.825587 20 I S 0.2 2628113.0 686983 > > 3.825587 > > 21 I S 0.4 2475448.0 686983 3.603361 > > 22 I S 0.6 2475448.0 686983 3.603361 > > 23 I S 0.8 2475448.0 686983 3.603361 > > 24 I S 1.0 2475448.0 686983 3.603361 > > 25 I F 0.0 871670.0 686983 1.268838 > > 26 I F 0.2 1066742.0 686983 1.552792 > > 27 I F 0.4 1136213.0 686983 1.653917 > > 28 I F 0.6 1210547.0 686983 1.762121 > > 29 I F 0.8 1256777.0 686983 1.829415 30 I F 1.0 1304294.0 686983 > > 1.898583 > > 31 I I 0.0 897718.0 686983 1.306754 > > 32 I I 0.2 1123968.0 686983 1.636093 > > 33 I I 0.4 1301097.0 686983 1.893929 > > 34 I I 0.6 1373663.0 686983 1.999559 > > 35 I I 0.8 1424121.0 686983 2.073008 > > 36 I I 1.0 1542813.0 686983 2.245780 > > 37 I D 0.0 937621.0 686983 1.364839 > > 38 I D 0.2 1205063.0 686983 1.754138 > > 39 I D 0.4 1341839.0 686983 1.953235 40 I D 0.6 1431970.0 686983 > > 2.084433 > > 41 I D 0.8 1538944.0 686983 2.240149 > > 42 I D 1.0 1670073.0 686983 2.431025 > > 43 D L 0.0 731904.0 686983 1.065389 > > 44 D L 0.2 900183.0 686983 1.310342 > > 45 D L 0.4 964870.1 686983 1.404504 > > 46 D L 0.6 1017462.8 686983 1.481060 > > 47 D L 0.8 1064435.2 686983 1.549435 > > 48 D L 1.0 1107595.0 686983 1.612260 > > 49 D S 0.0 798289.0 686983 1.162022 50 D S 0.2 1014643.2 686983 > > 1.476955 > > 51 D S 0.4 1125711.8 686983 1.638631 > > 52 D S 0.6 1220923.0 686983 1.777224 > > 53 D S 0.8 1306571.2 686983 1.901897 > > 54 D S 1.0 1399836.0 686983 2.037657 > > 55 D F 0.0 724924.0 686983 1.055229 > > 56 D F 0.2 935413.5 686983 1.361625 > > 57 D F 0.4 1011621.9 686983 1.472557 > > 58 D F 0.6 1071081.6 686983 1.559109 > > 59 D F 0.8 1139325.8 686983 1.658448 60 D F 1.0 1181282.1 686983 > > 1.719522 > > 61 D I 0.0 755841.0 686983 1.100232 > > 62 D I 0.2 964335.0 686983 1.403725 > > 63 D I 0.4 1051233.4 686983 1.530218 > > 64 D I 0.6 1110842.0 686983 1.616986 > > 65 D I 0.8 1193509.0 686983 1.737320 > > 66 D I 1.0 1264249.0 686983 1.840292 > > 67 D D 0.0 751660.0 686983 1.094146 > > 68 D D 0.2 1019735.0 686983 1.484367 > > 69 D D 0.4 1101191.0 686983 1.602938 70 D D 0.6 1191547.0 686983 > > 1.734464 > > 71 D D 0.8 1293433.0 686983 1.882773 > > 72 D D 1.0 1340360.0 686983 1.951082 > > > > > > > -- > PhD candidate in Computer Science > Address > 3 avenue lamine, cité ezzahra, Sousse 4000 Tunisia > tel: +216 97 246 706 (+33640302046 jusqu'au 15/6) > fax: +216 71 391 166 ______________________________________________ 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.