[R] how to output profile plots for groups using lattice package

[George Kalema]

Hi Peter (and anyone else willing to help me out),
Many thanks for your help. Having used your code plus a few other
modifications, I only get the points plotted but without the two lines. I
just cannot figure out what the problem is.

My code is as follows:

library(lattice)
datos2 <- subset(datos, samplesize != 10 & parm != "Theta0")
unq <- sort(unique(datos2$samplesize))
datos2$fsamplesize <- factor(datos2$samplesize, labels = paste("Sample
size =", unq))
datos2$parm <- factor(datos2$parm, levels = c("Intercept", "time",
"trt", "time*trt"))
tp1.sim <- xyplot(MSE ~ ntimes | fsamplesize + parm, group = group, data
= datos2,
    type = "b", lty = 1:2, pch = 1:2,
    scales = list(x = list(at = c(2, 4, 8, 16)), alternating = 1),
    as.table = TRUE, key = list(text = list(c("GNA", "PNA")), points =
list(pch = 1:2))
)
plot(tp1.sim)

I have attached my real dataset (called datos) as well.

Kind appreciations to your efforts.

George


On Wed, Oct 7, 2009 at 9:20 AM, Peter Ehlers <ehlers at ucalgary.ca> wrote:

> see below
>
> George Kalema wrote:
>
>> Dear R users,
>> I am trying to have an xyplot of a data set which has the following
>> variables:
>> case (n=10,20,30)
>> parameter (parm=a,b)
>> group (grp=g1,g2)
>> y (y values)
>> x (x=2,4,8)
>>
>> My plot should be parameter by case such that I have 2 rows (each row=
>> each
>> parameter) and 3 columns (each column=each case). My R-code is as follows
>> but I am not able to get what I want to:
>>
>> tp1.sim <- xyplot(y~ x | case + parm , group=group, data = data, lty = 1:4
>> ,
>> pch = 1:4)
>> print(tp1.sim)
>>
>> How can I have two lines (for g1 and g2) in each plot (each box)?
>>
> include the type="b" argument
>
>  How do I label the x-axis with only values 2, 4, 8?
>>
> include the scales= argument or make x a factor
>
>  How do I label each column with the corresponding case number?
>>
> make 'case' a factor
>
> The following should do what you want:
>
> xyplot(y ~ x | factor(case) + parm, group=group, data=data,
>    type='b', lty=1:2, pch=1:2,
>    scales=list(x=list(at=c(2,4,8)))
> )
>
> I don't understand why you want 4 line types/point chars.
>
>  -Peter Ehlers
>
>
>> My hypothetical data set is as follows:
>>
>> parm x case y group
>> a 2 10 0.03 g1
>> b 2 10 0.02 g1
>> a 4 10 0.03 g1
>> b 4 10 0.02 g1
>> a 8 10 0.03 g1
>> b 8 10 0.02 g1
>> a 2 20 0.03 g1
>> b 2 20 0.02 g1
>> a 4 20 0.03 g1
>> b 4 20 0.02 g1
>> a 8 20 0.03 g1
>> b 8 20 0.02 g1
>> a 2 30 0.03 g1
>> b 2 30 0.02 g1
>> a 4 30 0.03 g1
>> b 4 30 0.02 g1
>> a 8 30 0.03 g1
>> b 8 30 0.02 g1
>> a 2 10 0.13 g2
>> b 2 10 0.12 g2
>> a 4 10 0.13 g2
>> b 4 10 0.12 g2
>> a 8 10 0.13 g2
>> b 8 10 0.12 g2
>> a 2 20 0.13 g2
>> b 2 20 0.12 g2
>> a 4 20 0.13 g2
>> b 4 20 0.12 g2
>> a 8 20 0.13 g2
>> b 8 20 0.12 g2
>> a 2 30 0.13 g2
>> b 2 30 0.12 g2
>> a 4 30 0.13 g2
>> b 4 30 0.12 g2
>> a 8 30 0.13 g2
>> b 8 30 0.12 g2
>>
>> Many thanks in advance for your response.
>>
>> George
>>
>>        [[alternative HTML version deleted]]
>>
>> ______________________________________________
>> R-help at r-project.org mailing list
>> https://stat.ethz.ch/mailman/listinfo/r-help
>> PLEASE do read the posting guide
>> http://www.R-project.org/posting-guide.html
>> and provide commented, minimal, self-contained, reproducible code.
>>
>>
>>


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