call lattice function in a function passing

Ryan · 2008-12-11T15:13:57Z

> > If however I wanted to call the function "densityplot" within a function and > pass the "groups" argument as an argument of that function, how would I have > to proceed? It is not as straightforward as > > f densityplot(~ x, data, groups = groupvar) > } > > probably because the lattice function "densityplot.formula" preprocesses > the "groups" argument with > > groups > It there a way how I co

Ryan

Thu, Dec 11, 2008 7:13 AM

Here's one approach.  Pass the 'groups' variable as a character, then find 
that variable in the data frame and rename it.

d <- data.frame(x = rnorm(100), y = c("a", "b"))

f <- function(data, groupvar) {
	names(data)[which(names(data) == groupvar)] <- "gp"
  	densityplot(~ x, data, groups = gp)
}

f(d, groupvar="y")

Thread (3 messages)

Thomas Zumbrunn call lattice function in a function passing "groups" argument Dec 11 Ryan call lattice function in a function passing Dec 11 Deepayan Sarkar call lattice function in a function passing "groups" argument Dec 11