Sorry, Jim
that doesn't do the right thing.
> tmp <- factor(c("mm", "cm", "dm", "m", "km"))
> levels(tmp)
[1] "cm" "dm" "km" "m" "mm"
> tmp
[1] mm cm dm m km
Levels: cm dm km m mm
> levels(tmp) <- c("mm", "cm", "dm", "m", "km")
> tmp
[1] km mm cm m dm
Levels: mm cm dm m km
> ## back to the begining
> tmp <- factor(c("mm", "cm", "dm", "m", "km"))
> tmp
[1] mm cm dm m km
Levels: cm dm km m mm
> tmp <- factor(tmp, levels=unique(tmp))
> tmp
[1] mm cm dm m km
Levels: mm cm dm m km
>
Rich
On Thu, Jun 4, 2015 at 7:08 PM, Jim Lemon <[email protected]> wrote:
> Hi James,
> You can change the order of levels like this:
>
> levels(viagraData$dose)<-c("placebo","low dose","high dose")
>
> Although I don't know the exact names of the variable and its levels.
>
> Jim
>
> On Fri, Jun 5, 2015 at 7:19 AM, Richard M. Heiberger <[email protected]> wrote:
>> This example is based on ?glht
>>
>>> data(warpbreaks)
>>> glht(amod, linfct = mcp(tension = "Dunnett"))
>>
>> General Linear Hypotheses
>>
>> Multiple Comparisons of Means: Dunnett Contrasts
>>
>>
>> Linear Hypotheses:
>> Estimate
>> M - L == 0 -10.0
>> H - L == 0 -14.7
>>> levels(warpbreaks$tension)
>> [1] "L" "M" "H"
>>> warpbreaks$tension <- factor(warpbreaks$tension, levels=c("H","M","L"))
>>> amod <- aov(breaks ~ tension, data = warpbreaks)
>>> glht(amod, linfct = mcp(tension = "Dunnett"))
>>
>> General Linear Hypotheses
>>
>> Multiple Comparisons of Means: Dunnett Contrasts
>>
>>
>> Linear Hypotheses:
>> Estimate
>> M - H == 0 4.72
>> L - H == 0 14.72
>>
>>
>> Changing the order of the levels is easy. Rearranging the data itself
>> is not necessary.
>>
>> Rich
>>
>> On Thu, Jun 4, 2015 at 3:42 PM, James F. Henson
>> <[email protected]> wrote:
>>> Greetings
>>>
>>> Below is my code.
>>>
>>> library("multcomp")
>>> viaModel1 <- aov(libido ~ dose, data=viagraData)
>>> dunnettModel <- glht(viaModel1 , linfct = mcp(dose = "Dunnett"), base =
>>> "placebo")
>>>
>>> The code base="placebo" is ignored. All treatments are compared to the
>>> first treatment in the order, which is "high dose". It is possible to
>>> rearrange the order so that "placebo' is first, but this is inconvenient.
>>>
>>> Thanks,
>>> James F. Henson
>>>
>>> [[alternative HTML version deleted]]
>>>
>>> ______________________________________________
>>> [email protected] mailing list -- To UNSUBSCRIBE and more, see
>>> 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.
>>
>> ______________________________________________
>> [email protected] mailing list -- To UNSUBSCRIBE and more, see
>> 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.
>
> ______________________________________________
> [email protected] mailing list -- To UNSUBSCRIBE and more, see
> 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.
______________________________________________
[email protected] mailing list -- To UNSUBSCRIBE and more, see
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.
