Re: Babel/R issue: 'x' must be atomic

[John Hendy <jw.hendy@gmail.com>]

On Thu, Aug 23, 2012 at 6:23 PM, Karl Voit <devnull@karl-voit.at> wrote:
> Hi!
>
> Generating two separate boxplots for a given set of data is no problem. But
> when I combine them into one single diagram (with two boxplots), I get:
>
> Error in sort.int(x, na.last = na.last, decreasing = decreasing, ...) :
>   'x' must be atomic
> Calls: <Anonymous> ... boxplot.stats -> <Anonymous> -> sort -> sort.default -> sort.int
> Execution halted
>
>
> You can get the minimal example Org-mode on http://paste.grml.org/1036/
>
> When I replace the line
>             boxplot(list(folders, tags),
> with
>             boxplot(list(mfolders, mtags),
> it works, though :-O
>
> mfolders and mtags are lists in R and not imported via »:var«. Therefore I
> guess this is an Org-mode/babel issue and not an R issue. What is my error?
>
> Any help would be very cool!

Org must convert tables to data.frames, which is a problem for boxplot():

,----- ?boxplot -----
| x: for specifying data from which the boxplots are to be
|           produced. Either a numeric vector, or a single list
|           containing such vectors.
`-----

So, you need to pass a list of /vectors/, not a data.frame. Here's
what's going on:

#+begin_src R
> str(folders)
'data.frame':	10 obs. of  1 variable:
 $ V1: int  14 14 15 18 18 19 20 21 22 23
> str(mfolders)
 num [1:17] 4.3 3.72 5.1 4.03 5.7 ...
> str(tags)
'data.frame':	15 obs. of  1 variable:
 $ V1: int  1 3 3 3 3 3 4 4 4 4 ...
> str(mtags)
 num [1:15] 3.95 4.25 5.22 6.2 5.27 ...
#+end_src

So... folders is a data.frame with one numeric vector, V1. Same for
tags. For mfolder and mtags, you created a vector, not a data.frame.

Try this to pass the vectors from each data.frame:

#+begin_src R
boxplot(list(folders$V1, tags$V1),
    names=c("one", "two"),
    xlab="boxplot12",
    ylab="numbers",
    pars = list(boxwex = 0.3, staplewex = 0.5,
    boxfill="lightblue"))
#+end_src


That should work!
John

>
>
> PS: Org-mode version from git from yesterday
>
> --
> Karl Voit
>
>