problem with xyplot
On Friday 26 November 2004 11:58, Carlisle Thacker wrote:
Dear Rlisters,
When trying to indicate which data belong to which of 7 groups, the
following plot shows only 5 groups:
ss <- trellis.par.get("superpose.symbol")
ss$col <- c("red","blue","green","yellow","orange","magenta","cyan")
ss$pch <- format(1:7)
ss$cex <- 1.2
ss <- trellis.par.get("background")
At which point, all the changes you made to 'superpose/symbol' are lost.
ss$col <- "white"
trellis.par.set("background",ss)
xyplot(t~s,data=P0,
subset = p==1500 & whichLonP==2 & whichLatP==3 & t<6 &
id>100000000, groups = id%/%1000)
# don't see groups 6 and 7 ?????????????
xyplot(1:7 ~ 1:7, groups = 1:7) works for me (produces 7 distinct colors). I don't see how we can diagnose your problem without a (preferably small) reproducible example.
But groups can be put into separate panels: xyplot(t~s|factor(id%/%1000),data=P0,as.table=TRUE, subset = p==1500 & whichLonP==2 & whichLatP==3 & t<6 & id>100000000) And using a smaller dataframe helps: temp <- P0[P0$p==1500 & whichLonP==2 & whichLatP==3 & P0$t<6,] xyplot(t~s,data=temp, subset = id>100000000, groups = id%/%1000) # get different labels but all groups Also, for other plots involving large dataframes, specifying groups made the plotting very slow.
Every level in groups causes a call to grid.points (within each panel), so a large number of levels in groups could well make things slow. Deepayan