lattice - object 'panel.bpplot' not found error in R -


i'm new r , i'm trying create lattice bwplot, i'm getting error saying object 'panel.bpplot' not found. have tried using following example r documentation:

set.seed(13) x <- rnorm(1000) g <- sample(1:6, 1000, replace=true) x[g==1][1:20] <- rnorm(20)+3   # contaminate 20 x's group 1  # default trellis box plot require(lattice) bwplot(g ~ x) bwplot(g ~ x, panel=panel.bpplot, probs=seq(.01,.49,by=.01), datadensity=true)

the result first plot created (bwplot(g ~ x)), when second 1 tries run get:

error in bwplot.formula(g ~ x, panel = panel.bpplot, probs = seq(0.01,  : object 'panel.bpplot' not found

any appreciated!

panel.bpplot function of package hmisc, need attach package before plotting.

library(hmisc) bwplot(g ~ x, panel=panel.bpplot, probs=seq(.01,.49,by=.01), datadensity=true)

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