[R] xyplot auto.key issue

[Deepayan Sarkar]

On 7/30/05, Mike Lawrence <Mike.Lawrence at dal.ca> wrote:
> Quick correction:
> 
> The lines "lines = T," & "type = "b"" in the "par.settings" section should
> not
> be there. They are remnants of my previous (failed) attempts at solving the
> problem. Below is the correct code:
> 
> xyplot(
> 	#basic settings
> 	bias ~ sample_size | measure,
> 	data = bias,
> 	groups = exp_tau,
> 	type = "b",
> 	pch = c(1,2,3,4,5),
> 	#make strips transparent
> 	strip = function(bg, ...) strip.default(bg = 'transparent', ...),
> 	# tweak scales
> 	scales=list(
> 		x=list(
> 			at = c(20, 40, 60),
> 			tck = c(1,0),
> 			alternating = F
> 		),
> 		y=list(
> 			at = c(-50, -25, 0, 25, 50),
> 			tck = c(1,0),
> 			alternating = F
> 		)
> 	),
> 	# tell key to match symbols to those used in the plot
> 	par.settings = list(
> 		superpose.symbol = list(
> 			cex = .8,
> 			pch = c(1,2,3,4,5)
> 		)
> 	),
> 	# key settings
> 	auto.key = list (
> 		lines = T,
> 		size = 7,

You seem to be missing a 'type="b"' somewhere here. The type="b"
argument to xyplot is actually handled by the panel function. The key
has type="l" by default (see under 'key' in ?xyplot) and has to be
changed explicitly.

> 		border = T,
> 		cex.title = 1.2,
> 		title = "Expected Tau",
> 		text = c("30 ms", "80 ms", "130 ms", "180 ms", "230 ms"),
> 		space = "right",
> 	)
> )
> 
> 
> 
> Quoting Mike Lawrence <Mike.Lawrence at dal.ca>:
> 
> > Hi all,
> >
> > I'm having a problem with the auto.key function in xyplot. I hate to 
> > bother the
> > list like this and I'm positive I must be missing something very simple,
> yet
> > I've spent the last day searching for a solution to no avail.
> >
> > Essentially, I want a key that contains entries in which the plot points
> are
> > superimposed on a line of the same color as the points, like this:
> o--o--o
> > Now, given the presence of the default "divide" command, I assume this is
> > simple; indeed, I get the impression that this representation is 
> > supposed to be
> > produced automatically. Yet I can't seem to get it to work!
> >
> > Now, I've incorporated various other tweaks to my xyplot function, so I'm
> > wondering if these tweaks are somehow hindering my efforts. The function
> is
> > pasted below; I am making a 3x3 plot, each panel contains 5 lines and it
> is
> > these lines that I want represented in the key. See the comments for
> > descriptions of the modifications.
> >
> > Any help would be greatly appreciated.
> >
> > Cheers,
> >
> > Mike
> >
> >
> > xyplot(
> > 	#basic settings
> > 	bias ~ sample_size | measure,
> > 	data = bias,
> > 	groups = exp_tau,
> > 	type = "b",
> > 	pch = c(1,2,3,4,5),
> > 	#make strips transparent
> > 	strip = function(bg, ...) strip.default(bg = 'transparent', ...),
> > 	# tweak scales
> > 	scales=list(
> > 		x=list(
> > 			at = c(20, 40, 60),
> > 			tck = c(1,0),
> > 			alternating = F
> > 		),
> > 		y=list(
> > 			at = c(-50, -25, 0, 25, 50),
> > 			tck = c(1,0),
> > 			alternating = F
> > 		)
> > 	),
> > 	# tell key to match symbols to those used in the plot
> > 	par.settings = list(
> > 		superpose.symbol = list(
> > 			cex = .8,
> > 			pch = c(1,2,3,4,5)
> > 		),
> > 		lines = T,
> > 		type = "b"
> > 	),
> > 	# key settings
> > 	auto.key = list (
> > 		lines = T,
> > 		size = 7,
> > 		border = T,
> > 		cex.title = 1.2,
> > 		title = "Expected Tau",
> > 		text = c("30 ms", "80 ms", "130 ms", "180 ms", "230 ms"),
> > 		space = "right",
> > 	)
> > )
> >
> >
> >
> > --
> >
> > Mike Lawrence, BA(Hons)
> > Research Assistant to Dr. Gail Eskes
> > Dalhousie University & QEII Health Sciences Centre (Psychiatry)
> >
> > Mike.Lawrence at Dal.Ca
> >
> > "The road to Wisdom? Well, it's plain and simple to express:
> > Err and err and err again, but less and less and less."
> > - Piet Hein
> >
> > ______________________________________________
> > R-help at stat.math.ethz.ch mailing list
> > https://stat.ethz.ch/mailman/listinfo/r-help
> > PLEASE do read the posting guide!
> http://www.R-project.org/posting-guide.html
> >
> 
> 
> 
> -- 
> 
> Mike Lawrence, BA(Hons)
> Research Assistant to Dr. Gail Eskes
> Dalhousie University & QEII Health Sciences Centre (Psychiatry)
> 
> Mike.Lawrence at Dal.Ca
> 
> "The road to Wisdom? Well, it's plain and simple to express:
> Err and err and err again, but less and less and less."
> - Piet Hein
> 
> ______________________________________________
> R-help at stat.math.ethz.ch mailing list
> https://stat.ethz.ch/mailman/listinfo/r-help
> PLEASE do read the posting guide!
> http://www.R-project.org/posting-guide.html
>