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

[Peter Ehlers]

Hi George,

Your problem is not with xyplot, but with the NA occurrences in
your data. Try adding

   subset = {!is.na(MSE)},

to your xyplot call, or (better), subset the data before
calling xyplot.

  -Peter Ehlers

George Kalema wrote:
> 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]]
>>>
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>>>
> 
>