[R] Removing NAs from dataframe (for use in Vioplot)

[David Winsemius]

> On Apr 30, 2016, at 4:16 PM, David Winsemius <dwinsemius at comcast.net> wrote:
> 
> 
>> On Apr 30, 2016, at 12:58 PM, Mike Smith <mike at hsm.org.uk> wrote:
>> 
>> Hi
>> 
>> First post and a relative R newbie....
>> 
>> I am using the vioplot library to produce some violin plots.

It's a package,  .... not a library.

>> I have an input CSV with columns off irregular length that contain NAs. I want to strip the NAs out and produce a multiple violin plot automatically labelled using the headers. At the moment I do this
>> 
>> Code: 
>> ds1 = read.csv("http://www.lecturematerials.co.uk/data/spelling.csv")
>> library(vioplot)
>> y6<-na.omit(ds1$y6)
>> y5<-na.omit(ds1$y5)
>> y4<-na.omit(ds1$y4)
>> y3<-na.omit(ds1$y3)
>> y2<-na.omit(ds1$y2)
>> y1<-na.omit(ds1$y1)
>> vioplot(y6, y5, y4,y3,y2,y1,horizontal=TRUE, names=c("Y6", "Y5","Y4","Y3","Y2","Y1"), col = "lightblue")
>> 
>> 
>> Two queries:
>> 
>> 1. Is there a more elegant way of automatically stripping the NAs, passing the columns to the function along with the header names??
>> 
> 
> ds2 <- lapply( ds1, na.omit)
> 
> 
>> 2. Can I easily add the sample size to each violin plotted??
> 
>> ?violplot
> No documentation for ‘violplot’ in specified packages and libraries:
> you could try ‘??violplot’

I see that I mispled that _package_ name. However, after loading it I realized that I had no way of replicating what you are seeing, because you didn't provide that file (or even something that resembles it. It's rather unclear how you wanted this information presented.

-- 
David.


David Winsemius
Alameda, CA, USA