Re: [R] extracting a element with a name attribute from a list

From: Peter Dalgaard <p.dalgaard_at_biostat.ku.dk>
Date: Sat 18 Feb 2006 - 09:01:28 EST

"Taka Matzmoto" <sell_mirage_ne@hotmail.com> writes:

> Hi R users
>
> I like to extract (or collect) a numeric element with a name from a list.
>
> Is there any way to extract just a numeric element without the name
> attached to the element.
>
> For example,
>
> >mylist
>
> Mantel-Haenszel chi-squared test with continuity correction
>
> data: table(mydata[, x])
> Mantel-Haenszel X-squared = 8.3832, df = 1, p-value = 0.003787
> alternative hypothesis: true common odds ratio is not equal to 1
> 95 percent confidence interval:
> 0.2596963 0.7647255
> sample estimates:
> common odds ratio
> 0.4456415
>
> >is.list(mylist)
> [1] TRUE
> >names(mylist)
> [1] "statistic" "parameter" "p.value" "conf.int" "estimate"
> "null.value" "alternative"
> [8] "method" "data.name"
> >mylist$estimate
> common odds ratio
> 0.4456415
>
> I like to extract only a numeric element ( 0.4456415 ) without the
> name (common odds ratio).
>
> How can I do that ?

x <- mylist$estimate
names(x) <- NULL

or

x <- as.vector(mylist$estimate)

-- 
   O__  ---- Peter Dalgaard             ุster Farimagsgade 5, Entr.B
  c/ /'_ --- Dept. of Biostatistics     PO Box 2099, 1014 Cph. K
 (*) \(*) -- University of Copenhagen   Denmark          Ph:  (+45) 35327918
~~~~~~~~~~ - (p.dalgaard@biostat.ku.dk)                  FAX: (+45) 35327907

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Received on Sat Feb 18 09:06:19 2006

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