Dear latticists, Getting legend and graph line types synchronized has been a challenge in lattice; the last example below that works looks ridiculously ugly for such a simple job, I am sure there is a more elegant solution.
When trying this out, I found a feature which I found confusing: why are line types (lty) "translated" to line widths (lwd) in the legend? See attached pdf in case this should not be reproducible on your computer. Dieter Library(lattice) os = OrchardSprays[OrchardSprays$rowpos <4,] os$rowpos = as.factor(os$rowpos) # Set it globally # This is confusing: why is lty used as lwd in legend?? trellis.par.set(superpose.line = list(col=c("blue","red","green"), lwd = 2, lty=c(1,4,6))) xyplot(decrease ~ treatment, os, groups = rowpos, type = "a", auto.key = list(space = "right", points = FALSE, lines = TRUE)) dev.off() # To me, this seems to be the most consistent method if it worked. s= simpleTheme(lty=c(1,4,6),col=c("red","blue","green"),lwd=3) xyplot(decrease ~ treatment, os, groups = rowpos, par.settings=s, type = "a", auto.key = list(space = "right", points = FALSE, lines = TRUE)) # !!! There must be an easier way to synchronize legend and plot xyplot(decrease~treatment,data=os,groups=rowpos, type = "a",par.settings=s, key = list(text=list(levels(os$rowpos)), lines=list(lty=s$superpose.line$lty, lwd=s$superpose.line$lwd, col= s$superpose.line$col))) -------------------------------------------------------- R version 2.12.1 (2010-12-16) Platform: i386-pc-mingw32/i386 (32-bit) locale: [1] LC_COLLATE=German_Germany.1252 LC_CTYPE=German_Germany.1252 [3] LC_MONETARY=German_Germany.1252 LC_NUMERIC=C [5] LC_TIME=German_Germany.1252 attached base packages: [1] stats graphics grDevices datasets utils methods base other attached packages: [1] lattice_0.19-17 loaded via a namespace (and not attached): [1] grid_2.12.1 tools_2.12.1 >
lwdAsLty.pdf
Description: lwdAsLty.pdf
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