[R] two questions re: the use of lattice

[jim holtman]

Answer to you first question, try this at the start of bwplot to
specify ordering:

bwplot(Error~factor(Method, levels = unique(Method))

On Sat, Jul 21, 2012 at 2:42 PM, Ranjan Maitra
<maitra.mbox.ignored at inbox.com> wrote:
> Dear friends,
>
> I have two questions regarding the use of lattice. First some code:
>
>
> ## begin code
>
> z <- cbind(rep(c("BIC", "ICL", "s_v", "Q_v", "sig-q",
>                       "s_lsk", "s_lML", "s_mlsk", "s_mlML", "s_la8",
> "s_haar"), each = 250), rep(c(5, 10, 20, 30, 50), each = 50))
> z <- rbind(cbind(z, 0), cbind(z, 20), cbind(z, 40))
> z <- cbind(z, rnorm(n = nrow(z)))
> z <- as.data.frame(z)
> names(z) <- c("Method", "sigma", "INU", "Error")
> sigma <- as.numeric(levels(z$sigma))
> sigmaExprList <- lapply(sigma, function(s) bquote(italic(sigma) == .
> (s))) sigmaExpr <- as.expression(sigmaExprList)
> bwplot(Error~Method | sigma, data = z[z[,"INU"] == 0,],scales=list
> (rot=90), horiz = F, xlab = "Method", ylab = "Relative Error",
>        strip = function(which.given, which.panel, var.name,
>          strip.levels = FALSE,
>          strip.names = TRUE, ...) {
>          strip.default(which.given, which.panel,
>                        var.name = sigmaExpr[which.panel],
>                        strip.levels = FALSE,
>                        strip.names = TRUE, ...)
>         },
>         layout = c(5,1),  col = "red")
>
>
> ## end code
>
> Question 1: how do I "force" the display of the "Method" in the
> plotting to be in the same order (i.e.,  in the order of "BIC", "ICL",
> "s_v", "Q_v", "sig-q", "s_lsk", "s_lML", "s_mlsk", "s_mlML", "s_la8",
> "s_haar") as the input. As you may notice, it puts them in its own
> merry order (I suspect in ascii alphabetical order, but that conjecture
> is based entirely on my very few sample attempts).
>
> Question 2: I want to have 3x5 plots of the respective boxplots.
> Something like:
> Error ~ Method | sigma + INU?
> But I want the labels for the sigma and the INU to be only in the
> column and the rows (vertically here) as appropriate, in order to save
> plotting space. How do I go about doing this?
>
> Please reply through the mailing list so that others may also benefit.
> In any case, many thanks again for reading and for any help and
> pointers!
>
> Best wishes,
> Ranjan
>
>
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-- 
Jim Holtman
Data Munger Guru

What is the problem that you are trying to solve?
Tell me what you want to do, not how you want to do it.