[R] sample weight for box plot?

[sean_parks]

Thanks David.  I used the wtd.quantile in Hmisc. Works great and is easy for
a newbie like me.

I am attempting to send the quantile values to boxplot, and it works for the
most part.  My problem is that one of my extreme values appears as a dot
instead of the "whisker".  It basically looks like an outlier dot. I
attached the image.

Here is my specific example:
bxp.data <- c(0,0.9,3.5,9.4,30.6)
boxplot(bxp.data)

http://n4.nabble.com/file/n1008453/boxplot.example.bmp 


If anyone has any ideas to make my extreme valu behave like a proper
whisker, please let me know.

Thanks,
Sean




David Winsemius wrote:
> 
> 
> On Oct 28, 2009, at 8:00 PM, Sean Parks wrote:
> 
>>
>> Hi,
>>
>> I would like to make a box and whisker plot but use a sample weight  
>> for each
>> observation.  I've searched around a bit and have not found a method  
>> of
>> doing this.
>>
>> Anyone have any advice?
> 
> There are a variety of ways to get weighted quantiles. Two that have  
> come up in recent r-help postings are the facilities in the quantreg  
> package and wtd.quantile in Hmisc. Once you have calculated the five  
> numbers that define a box-whisker plot they can be passed to bxp.
> 
> ?bxp
>>
> -- 
> 
> David Winsemius, MD
> Heritage Laboratories
> West Hartford, CT
> 
> ______________________________________________
> R-help at r-project.org mailing list
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> 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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