On 8/30/07, Folkes, Michael <[EMAIL PROTECTED]> wrote:
> I've succeeded doing a subset within the panel function of xyplot - if I'm
> subsetting based on either the value of 'x' or 'y' (e.g. below). However, I
> wish to subset based on the value of another variable and colour that one
> plotted point. It's not working. Either it doesn't plot the coloured data
> point, or if I sort the data differently it colours one datapoint, but the
> wrong one. I assume this means it's not getting the right subscripts?
> Finally I can sort of see the light as if I remove the conditioning variable
> (week) and subset before the xyplot (e.g. week==1) to get just one panel, it
> plots the correct data including the correct single red point.
> Where am I erring?
> _______________________________________
> print(xyplot(yval~xval|week,data=mydata,
> panel=function(x,y,subscripts){
> #panel.xyplot(x,y,type='p',col=1,cex=.5)
> panel.xyplot(x[y<=40],y[y<=40],type='p',col=2,cex=.5) # <-----this
> works
>
> panel.xyplot(x[mydata$yr==2005],y[mydata$yr==2005],type='p',pch=16,col=2,cex=.5)
> # <-----sometimes this won't work or it colours wrong datapoint
> }))
> ___________________________
Why not
xyplot(yval~xval|week,data=mydata, subset = yval < 40)
or
xyplot(yval~xval|week,data=mydata, subset = yr==2005)
-Deepayan
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