[R] R prints empty group on my figure!!

[PIKAL Petr]

Hi

Use drop=TRUE argument in interaction for removing unused levels.

Petr


> -----Original Message-----
> From: r-help-bounces at r-project.org [mailto:r-help-bounces at 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 <adelessafi at 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
> >
> >
> 
> 
> --
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