[R] xyplot auto.key issue

[Mike Lawrence]

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,
		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
>
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>



-- 

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