[R] Order of boxplots

[peter dalgaard]

> On 15 Sep 2015, at 04:31 , li li <hannah.hlx at gmail.com> wrote:
> 
> Hi Jeff,
>  Thanks for replying. I actually tried "ordered(tmp$type, levels=c("c",
> "b", "a")."
> But I think only the order of the letters on x axis changed but the order

You _think_ ??? Documentation, please...

The boxplots certainly move if I do

plot(result ~ type, tmp)
plot(result ~ factor(type, levels=c("c","b","a")), tmp)



> of the boxplot did not. So there is some problem there. I also tried
> as.factor(tmp$type); levels(tmp$type)=c("c", "b", "a") and got the same

That changes the level _names_: 1st group name becomes "c" instead of "a"; you want the 3rd group to become the 1st but still be called "c".

-pd


> thing.
>    Thanks.
>      Li
> 
> 2015-09-14 21:44 GMT-04:00 Jeff Newmiller <jdnewmil at dcn.davis.ca.us>:
> 
>> Make your factor variable deliberately. That is, specify the levels
>> parameter with the values in order when you create the factor.
>> ---------------------------------------------------------------------------
>> Jeff Newmiller                        The     .....       .....  Go Live...
>> DCN:<jdnewmil at dcn.davis.ca.us>        Basics: ##.#.       ##.#.  Live
>> Go...
>>                                      Live:   OO#.. Dead: OO#..  Playing
>> Research Engineer (Solar/Batteries            O.O#.       #.O#.  with
>> /Software/Embedded Controllers)               .OO#.       .OO#.  rocks...1k
>> ---------------------------------------------------------------------------
>> Sent from my phone. Please excuse my brevity.
>> 
>> On September 14, 2015 6:23:50 PM PDT, li li <hannah.hlx at gmail.com> wrote:
>>> Hi all,
>>> I have the following data "tmp" and I want to plot  boxplots for
>>> each level of the factor "type" and the order the factor should be c,
>>> b ,a. In other words, the boxplot corresponding to the level "c"
>>> should be the first and so on.
>>> Any suggestions?
>>>  Li
>>> 
>>>> tmp
>>>  result type
>>> 1     101    a
>>> 2     101    a
>>> 3     101    a
>>> 4     101    a
>>> 5     101    a
>>> 6     101    a
>>> 7     100    a
>>> 8     106    b
>>> 9      91    b
>>> 10     78    b
>>> 11     95    b
>>> 12    111    b
>>> 13     92    b
>>> 14     98    b
>>> 15    108    c
>>> 16    112    c
>>> 17     98    c
>>> 18    102    c
>>> 19     88    c
>>> 20     86    c
>>> 21     81    c
>>> 
>>> ______________________________________________
>>> R-help at r-project.org 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.
>> 
>> 
> 
> 	[[alternative HTML version deleted]]
> 
> ______________________________________________
> R-help at r-project.org 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.

-- 
Peter Dalgaard, Professor,
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Email: pd.mes at cbs.dk  Priv: PDalgd at gmail.com