[R] barplot ignoring col parameter

[Federico Calboli]

On 5 Dec 2011, at 15:58, R. Michael Weylandt wrote:

> x <- c(2L, 108L, 0L, 0L, 0L, 1L, 3L, 0L, 0L, 0L, 0L, 0L, 7L, 18L,
> 3L, 4L, 8L, 20L, 26L, 20L, 19L, 7L, 1L, 1L)
> mycol = c(rep('yellow', 2), rep('white', 3), rep('orange',2),
> rep('white', 5), rep('orange',3), rep('red',9))
> barplot(x, col = mycol)
> 
> Produces a multi-colored barplot on my machine so I understand your
> confusion. Does the above work for you? It may be something hidden in
> your data.

It does work. Might it be that my data is a matrix? I'm using it to give a name for each bar.


> 
> What is your sessionInfo() and str(mydata)? Same problem in a fresh R
> session (with --vanilla if necessary)?


sessionInfo()
R version 2.14.0 (2011-10-31)
Platform: x86_64-apple-darwin9.8.0/x86_64 (64-bit)

locale:
[1] en_GB.UTF-8/en_GB.UTF-8/en_GB.UTF-8/C/en_GB.UTF-8/en_GB.UTF-8

attached base packages:
[1] splines   stats     graphics  grDevices utils     datasets  methods   base     

other attached packages:
[1] survival_2.36-10

loaded via a namespace (and not attached):
[1] tools_2.14.0


str(mydata)
num [1, 1:24] 2 108 0 0 0 1 3 0 0 0 ...
- attr(*, "dimnames")=List of 2
 ..$ : NULL
 ..$ : chr [1:24] "A" "B" "C" "D" ...


Basically, using the 'x' object as you created the code works, and I can have a workaround. I fail to see why it would not work using mydata.

Cheers

F



> 
> Michael
> 
> On Mon, Dec 5, 2011 at 10:44 AM, Federico Calboli
> <f.calboli at imperial.ac.uk> wrote:
>> Hi All,
>> 
>> I'm having a problem with barplot:
>> 
>> mydata
>> [1,]  2 108  0  0  0  1  3  0  0  0  0  0  7 18  3  4  8 20 26 20 19  7  1  1
>> 
>> mycol = c(rep('yellow', 2), rep('white', 3), rep('orange',2), rep('white', 5), rep('orange',3), rep('red',9))
>> 
>> barplot(mydata, col = mycol)
>> 
>> gives me an uniformly yellow barplot. How do I solve this?
>> 
>> bw
>> 
>> Federico
>> 
>> 
>> 
>> --
>> Federico C. F. Calboli
>> Neuroepidemiology and Ageing Research
>> Imperial College, St. Mary's Campus
>> Norfolk Place, London W2 1PG
>> 
>> Tel +44 (0)20 75941602   Fax +44 (0)20 75943193
>> 
>> f.calboli [.a.t] imperial.ac.uk
>> f.calboli [.a.t] gmail.com
>> 
>> ______________________________________________
>> 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.

--
Federico C. F. Calboli
Neuroepidemiology and Ageing Research
Imperial College, St. Mary's Campus
Norfolk Place, London W2 1PG

Tel +44 (0)20 75941602   Fax +44 (0)20 75943193

f.calboli [.a.t] imperial.ac.uk
f.calboli [.a.t] gmail.com