Re: [R] Feed list of vectors to vioplot()?

From: Johannes Graumann <johannes_graumann_at_web.de>
Date: Thu, 24 Apr 2008 09:11:33 +0200

Hm, now I have trouble using additional "vioplot" parameters.

mu<-2
si<-0.6
bimodal<-c(rnorm(1000,-mu,si),rnorm(1000,mu,si)) uniform<-runif(2000,-4,4)
normal<-rnorm(2000,0,3)
mylist <- list(bimodal,uniform,normal)
# Easy
do.call(vioplot,mylist)
# Works
do.call(vioplot,c(mylist,col="white"))

# Does not
# vioplot expects "names" as a "plain" vector, not in the 
# form "names=c("One","Two","Three")" ...
names <- c("One","Two","Three")
do.call(vioplot,c(mylist,col="white",names))

Any help on how to do this?

Thanks, Joh

Johannes Graumann wrote:

> Off-list it was pointed out to me that the trivial solution to this would
> look like this:
> myfunction2 <- function(x, ...){
>   mylist <- list(x, ...)
>   # plenty of "lapply" stuff
>   do.call(vioplot,mylist)
> }
> 
> Thanks for everybodies patience,
> 
> Joh
> 
> Johannes Graumann wrote:
> 

>> <posted & mailed>
>>
>> Thanks for the very appropriate scolding.
>>
>> Here's my example (based on "?vioplot"):
>> mu<-2
>> si<-0.6
>> bimodal<-c(rnorm(1000,-mu,si),rnorm(1000,mu,si))
>> uniform<-runif(2000,-4,4)
>> normal<-rnorm(2000,0,3)
>> # Working just fine
>> myfunction1 <- function(x, ...){vioplot(x,...)}
>> myfunction1(bimodal,uniform,normal)
>> # What I (believe to) need
>> myfunction2 <- function(x, ...){
>> mylist <- list(x, ...)
>> # plenty of "lapply" stuff
>> vioplot(mylist)
>> }
>> myfunction2(bimodal,uniform,normal)
>> --> Error in min(data) : invalid 'type' (list) of argument
>>
>> I'm at a loss on how to disentangle "mylist" - unlist just gives me one
>> big vector back rather than the 3 I want to have back ...
>>
>> Thanks for your patience, Joh
>>
>> jim holtman wrote:
>>
>>> PLEASE do read the posting guide
>>> http://www.R-project.org/posting-guide.html and provide commented,
>>> minimal, self-contained, reproducible code.
>>> 
>>> It is hard to provide a solution if we do not understand the problem
>>> to be solved.  Sample data would be helpful along with an
>>> understanding of what you would expect for output.
>>> 
>>> On Wed, Apr 23, 2008 at 10:11 AM, Johannes Graumann
>>> <johannes_graumann_at_web.de> wrote:
>>>>
>>>> Johannes Graumann wrote:
>>>>
>>>> > Hi,
>>>> >
>>>> > I have a list of vectors and am trying to coerce them into something
>>>> > that vioplot will take as groups of data to be plotted independently.
>>>> > Can someone nudge me into the right direction?
>>>> >
>>>> > Thanks, Joh
>>>> >
>>>> > ______________________________________________
>>>> > 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.
>>>>
>>>> I'll try less impolite and with more info ...
>>>>
>>>> I'm writing a function that contains this:
>>>>
>>>> # function(x, ... , morestuff){}
>>>>
>>>> which is gathered into a list like so:
>>>>
>>>> # mylist <- list(x, ...)
>>>>
>>>> down the line I'd like to output all elements from "mylist" in seperate
>>>> vioplots in a single coordiante system. Now I have a hell of a time
>>>> with that because vioplot does not accept a list as input but only a
>>>> succession of vectors ... how can I now force my list into that form so
>>>> a can say
>>>>
>>>> # vioplot(magicfunction(mylist))
>>>>
>>>> and get a violin plot for each list-member?
>>>>
>>>> Thanks for any hint,
>>>>
>>>>
>>>> Joh
>>>>
>>>> ______________________________________________
>>>> 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.
>>>>
>>> 
>>> 
>>>

>>
>> ______________________________________________
>> 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.
> 
> ______________________________________________
> 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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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. Received on Thu 24 Apr 2008 - 07:55:35 GMT

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