[R] bwplot: how to get plotmath labels?

From: Marius Hofert <m_hofert_at_web.de>
Date: Sat, 26 Mar 2011 09:47:07 +0100


Dear expeRts,

How can I get plotmath-labels in the bwplot below? As you can see, I couldn't manage to pass the expressions through the dimnames argument.

Cheers,

Marius

library(lattice)

## data

dim <- c(100, 6, 2, 3)
dimnames <- list(n=paste("n=", seq_len(100), sep=""),

	         groups=paste("group=", seq_len(6), sep=""),
	         methods=c(expression(method==1), expression(alpha=1)),
	         attr=paste("attribute=", seq_len(3), sep=""))
data <- rexp(prod(dim))
arr <- array(data=data, dim=dim, dimnames=dimnames) z <- abs(sweep(arr, 3, 1))
df <- as.data.frame.table(z, responseName="error")

## box plot

bwplot(error ~ methods | attr * groups, data=df,

       as.table=TRUE, outer=FALSE, strip=TRUE, notch=TRUE,
       scales=list(alternating=c(1,1), tck=c(1,0)))
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