R help - Oct 2012 - dotplot in ".R" with lattice & latticeExtra: proper visualization

Dear everyone,

I'm trying to do a dotplot with the libraries "lattice" and
"latticeExtra".
However, no proper representation of the values on the vertical y-axis is
done by ".R". Instead of choosing the actual values of the numeric
variable,
".R" plots the rank of the value. That is, there are values [375, 500,
625,
750, ..., 3000] and ".R" plots their ranks [1,2,3,4,...23] and chooses
the
scale accordingly. Has someone experienced a problem like this? How can I
manage the get a proper representation with ticks like (0, 500, 1000, 1500,
...) on the vertical y-scale?

Here's my data:
https://www.dropbox.com/s/egy25cj00rhum40/data.csv

And here the program code so far:

df.dose <- read.table("data.csv", sep=",", header=TRUE)
library(lattice); library(latticeExtra)

useOuterStrips(dotplot(z ~ sample.size |
as.factor(effect.size)*as.factor(true.dose),
		       groups=as.factor(type), data=df.dose, as.table=TRUE))

I'd be glad for any kind of help!
Andres



-----
Andres
--
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On Oct 11, 2012, at 6:48 AM, Andres LaCortadora wrote:
> Dear everyone,
> 
> I'm trying to do a dotplot with the libraries "lattice" and
"latticeExtra".
> However, no proper representation of the values on the vertical y-axis is
> done by ".R". Instead of choosing the actual values of the
numeric variable,
> ".R" plots the rank of the value. That is, there are values [375,
500, 625,
> 750, ..., 3000] and ".R" plots their ranks [1,2,3,4,...23] and
chooses the
> scale accordingly. Has someone experienced a problem like this? How can I
> manage the get a proper representation with ticks like (0, 500, 1000, 1500,
> ...) on the vertical y-scale?
> 
I suspect it will be difficult with dotplot. It is expecting a factor variable
for the y-value and appears to be coercing the LHS argument to one. Why not use
xyplot if you are plotting numeric by numeric? If you what to add horizontal
lines `ala` dotplot you could construct a panel that had the appropriate
commands.
-- 
David.
> Here's my data:
> https://www.dropbox.com/s/egy25cj00rhum40/data.csv
> 
> And here the program code so far:
> 
> df.dose <- read.table("data.csv", sep=",",
header=TRUE)
> library(lattice); library(latticeExtra)
> 
> useOuterStrips(dotplot(z ~ sample.size |
> as.factor(effect.size)*as.factor(true.dose),
> 		       groups=as.factor(type), data=df.dose, as.table=TRUE))
> 
> I'd be glad for any kind of help!
> Andres
> 
David Winsemius, MD
Alameda, CA, USA