R help - Jul 2012 - About dpik function

Hi there and thanks in advance.

Nowadays I am working on the plug-in bandwidth selection with R. Firstly, my
1010 data is the return rate from Yahoo Finance.
Secondly, my code is following:
>
r=read.table("/Users/user/Desktop/research/a.txt",sep=",",header=TRUE)
> x<-r[8:1010,]
> library(KernSmooth)
>
dpik(x,scalest="minim",level=2L,kernel="normal",canonical=FALSE,gridsize=401L,range.x=range(x),truncate=TRUE)
But the error happens like this:
Error in Summary.factor(c(233L, 917L, 381L, 748L, 272L, 242L, 269L, 963L,  : 
  range not meaningful for factors

I don't know what's wrong and i am a rookie, please help with that.
Thanks!


--
View this message in context:
http://r.789695.n4.nabble.com/About-dpik-function-tp4636590.html
Sent from the R help mailing list archive at Nabble.com.

On 15/07/2012 19:57, chester123 wrote:
> Hi there and thanks in advance.
>
> Nowadays I am working on the plug-in bandwidth selection with R. Firstly,
my
So why use package KernSmooth and not the methods in R itself?
> 1010 data is the return rate from Yahoo Finance.
> Secondly, my code is following:
>>
r=read.table("/Users/user/Desktop/research/a.txt",sep=",",header=TRUE)
>> x<-r[8:1010,]
>> library(KernSmooth)
>>
dpik(x,scalest="minim",level=2L,kernel="normal",canonical=FALSE,gridsize=401L,range.x=range(x),truncate=TRUE)
>
> But the error happens like this:
> Error in Summary.factor(c(233L, 917L, 381L, 748L, 272L, 242L, 269L, 963L, 
:
>    range not meaningful for factors
>
> I don't know what's wrong and i am a rookie, please help with that.
Thanks!
So what is 'x'?  We don't know (your code is not reproducible), but
it
sure looks like a factor.  And from the help:

        x: vector containing the sample on which the kernel density
           estimate is to be constructed.

A factor is not a vector (in this sense).
> PLEASE do read the posting guide
http://www.R-project.org/posting-guide.html
> and provide commented, minimal, self-contained, reproducible code.
PLEASE do as you were asked.


-- 
Brian D. Ripley,                  ripley at stats.ox.ac.uk
Professor of Applied Statistics,  http://www.stats.ox.ac.uk/~ripley/
University of Oxford,             Tel:  +44 1865 272861 (self)
1 South Parks Road,                     +44 1865 272866 (PA)
Oxford OX1 3TG, UK                Fax:  +44 1865 272595