R help - Sep 2006 - Wilcoxon Rank test of Package Coin

Hi,

I am running the following example which can be found on page 12 of the pdf file
of COIN package

wt<-wilcox_test(pd~age,data=water_transfer,distribution="exact",
conf.int=TRUE)

"wt" actually contains the estimate of difference in location and the
confidence interval of it.  I am just wondering how can I extract these values?
From the examples, I understand that the Wilcoxon statistic can be extracted as
statitic(wt,"linear") 
and the exact two-sides p-value can be extracted as 
pvalue(wt) 

But I haven't been able to find the correct function to extract the
estimates of difference median of y-x) and the confidence interval of this
estimates. Shall I go back to the  package ExactRankTest? I do know how to
extracted these values from function wilcox.exact there.

Thank you
 

Jue Wang, Biostatistician
Contracted Position for Preclinical & Research Biostatistics
PrO Unlimited
(908) 231-3022

Jue.Wang2 at sanofi-aventis.com wrote:
> Hi,
> 
> I am running the following example which can be found on page 12 of
> the pdf file of COIN package
> 
>
wt<-wilcox_test(pd~age,data=water_transfer,distribution="exact",
> conf.int=TRUE)
> 
> "wt" actually contains the estimate of difference in location and
the
> confidence interval of it.  I am just wondering how can I extract
> these values? From the examples, I understand that the Wilcoxon
> statistic can be extracted as statitic(wt,"linear") and the exact
> two-sides p-value can be extracted as pvalue(wt)
> 
> But I haven't been able to find the correct function to extract the
> estimates of difference median of y-x) and the confidence interval of
> this estimates. 
Take a look at the help page for `wilcox_test', where it's clearly 
spelled out in the `Value:' section that "...Confidence intervals can
be
extracted by 'confint'."

 > confint(wt)
95 percent confidence interval:
  -0.76  0.15
sample estimates:
difference in location
                 -0.305
> Shall I go back to the  package ExactRankTest? I do
> know how to extracted these values from function wilcox.exact there.
Compared to `coin', the `exactRankTests' package is very limited in 
function.


HTH,
Henric


> 
> Thank you
> 
> 
> Jue Wang, Biostatistician Contracted Position for Preclinical &
> Research Biostatistics PrO Unlimited (908) 231-3022
> 
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