Dear Jim,
Many thanks for following up on this. Sure, I can provide a sample code. At the
end of the code you see that I extract the p-value and the test statistic.
However, I cannot find the correlation coefficient rho anywhere in the object
?r?.
Best,
Christine
if(!require(pacman)) install.packages("pacman")
pacman::p_load(sn, fGarch, coin)
# Happiness
central_tendency_sim <- 0
dispersion_sim <- 1
skewness_sim <- 1.5
N_sim <- 10000
Happiness <- seq(from = 0,
to = 10,
length.out = N_sim)
# City size
central_tendency_sim <- 3
dispersion_sim <- 1
skewness_sim <- 1.5
Citysize <- seq(from = 1,
to = 5,
length.out = N_sim)
# create dataframe
datastat <- data.frame(Happiness, Citysize)
# Bootstrapped correlation
r <- spearman_test(Happiness ~ Citysize, data = datastat, distribution =
"approximate", alternative = c("two.sided"))
r
pvalue(r)
statistic(r)
-----Urspr?ngliche Nachricht-----
Von: Jim Lemon <drjimlemon at gmail.com>
Gesendet: Mittwoch, 29. April 2020 05:53
An: Blume Christine <christine.blume at sbg.ac.at>
Cc: r-help at r-project.org
Betreff: Re: [R] Package 'coin' - How to extract rho
Hi Christine,
I noticed that your question did not receive a reply. As I don't know
exactly what you have tried, it is a bit difficult to suggest a solution. If you
are still unable to get this to work, could you provide an example of your
present code and data if necessary?
Jim
On Mon, Apr 27, 2020 at 3:09 AM Blume Christine <christine.blume at
sbg.ac.at<mailto:christine.blume at sbg.ac.at>> wrote:
>
> I am using the 'coin' package to compute bootstrapped correlations.
I am able to extract the p-value with confidence intervals as well as the test
statistic Z. However, I am unable to find rho, i.e. the correlation coefficient.
Can someone help?
>
> Kind regards,
> Christine
>
>
> [[alternative HTML version deleted]]
>
> ______________________________________________
> R-help at r-project.org<mailto:R-help at r-project.org> mailing list
-- To UNSUBSCRIBE and more, see
> 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.
[[alternative HTML version deleted]]
Christine, thanks for the example. As far as I can see, the "coin" package does not explicitly compute Spearman's rho. This is probably also the reason why it isn't reported in the test output. Thus, you would have to do this "by hand" using cor(..., method = "spearman"). Hope that helps, Achim On Wed, 29 Apr 2020, Blume Christine wrote:> Dear Jim, > > > > Many thanks for following up on this. Sure, I can provide a sample code. At the end of the code you see that I extract the p-value and the test statistic. However, I cannot find the correlation coefficient rho anywhere in the object ?r?. > > > > Best, > > Christine > > > > if(!require(pacman)) install.packages("pacman") > > pacman::p_load(sn, fGarch, coin) > > > > # Happiness > > central_tendency_sim <- 0 > > dispersion_sim <- 1 > > skewness_sim <- 1.5 > > > > N_sim <- 10000 > > > > Happiness <- seq(from = 0, > > to = 10, > > length.out = N_sim) > > > > # City size > > central_tendency_sim <- 3 > > dispersion_sim <- 1 > > skewness_sim <- 1.5 > > > > Citysize <- seq(from = 1, > > to = 5, > > length.out = N_sim) > > > > # create dataframe > > datastat <- data.frame(Happiness, Citysize) > > > > # Bootstrapped correlation > > r <- spearman_test(Happiness ~ Citysize, data = datastat, distribution = "approximate", alternative = c("two.sided")) > > r > > pvalue(r) > > statistic(r) > > > > > > -----Urspr?ngliche Nachricht----- > Von: Jim Lemon <drjimlemon at gmail.com> > Gesendet: Mittwoch, 29. April 2020 05:53 > An: Blume Christine <christine.blume at sbg.ac.at> > Cc: r-help at r-project.org > Betreff: Re: [R] Package 'coin' - How to extract rho > > > > Hi Christine, > > I noticed that your question did not receive a reply. As I don't know exactly what you have tried, it is a bit difficult to suggest a solution. If you are still unable to get this to work, could you provide an example of your present code and data if necessary? > > > > Jim > > > > On Mon, Apr 27, 2020 at 3:09 AM Blume Christine <christine.blume at sbg.ac.at<mailto:christine.blume at sbg.ac.at>> wrote: > >> > >> I am using the 'coin' package to compute bootstrapped correlations. I am able to extract the p-value with confidence intervals as well as the test statistic Z. However, I am unable to find rho, i.e. the correlation coefficient. Can someone help? > >> > >> Kind regards, > >> Christine > >> > >> > >> [[alternative HTML version deleted]] > >> > >> ______________________________________________ > >> R-help at r-project.org<mailto:R-help at r-project.org> mailing list -- To UNSUBSCRIBE and more, see > >> 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. > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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.
Dear Achim, Many thanks indeed. Yes, I had thought about this too and, fortunately, the bootstrapping confirms the results from the "normal" test. However, I was wondering whether it is mathematically acceptable to report the pvals from bootstrapping, but non-bootstrapped correlation coefficients. Does someone have an opinion on this? Best, Christine -----Urspr?ngliche Nachricht----- Von: Achim Zeileis <Achim.Zeileis at uibk.ac.at> Gesendet: Mittwoch, 29. April 2020 13:56 An: Blume Christine <christine.blume at sbg.ac.at> Cc: Jim Lemon <drjimlemon at gmail.com>; Torsten.Hothorn at uzh.ch; r-help at r-project.org Betreff: Re: [R] Package 'coin' - How to extract rho Christine, thanks for the example. As far as I can see, the "coin" package does not explicitly compute Spearman's rho. This is probably also the reason why it isn't reported in the test output. Thus, you would have to do this "by hand" using cor(..., method = "spearman"). Hope that helps, Achim On Wed, 29 Apr 2020, Blume Christine wrote:> Dear Jim, > > > > Many thanks for following up on this. Sure, I can provide a sample code. At the end of the code you see that I extract the p-value and the test statistic. However, I cannot find the correlation coefficient rho anywhere in the object ?r?. > > > > Best, > > Christine > > > > if(!require(pacman)) install.packages("pacman") > > pacman::p_load(sn, fGarch, coin) > > > > # Happiness > > central_tendency_sim <- 0 > > dispersion_sim <- 1 > > skewness_sim <- 1.5 > > > > N_sim <- 10000 > > > > Happiness <- seq(from = 0, > > to = 10, > > length.out = N_sim) > > > > # City size > > central_tendency_sim <- 3 > > dispersion_sim <- 1 > > skewness_sim <- 1.5 > > > > Citysize <- seq(from = 1, > > to = 5, > > length.out = N_sim) > > > > # create dataframe > > datastat <- data.frame(Happiness, Citysize) > > > > # Bootstrapped correlation > > r <- spearman_test(Happiness ~ Citysize, data = datastat, distribution > = "approximate", alternative = c("two.sided")) > > r > > pvalue(r) > > statistic(r) > > > > > > -----Urspr?ngliche Nachricht----- > Von: Jim Lemon <drjimlemon at gmail.com> > Gesendet: Mittwoch, 29. April 2020 05:53 > An: Blume Christine <christine.blume at sbg.ac.at> > Cc: r-help at r-project.org > Betreff: Re: [R] Package 'coin' - How to extract rho > > > > Hi Christine, > > I noticed that your question did not receive a reply. As I don't know exactly what you have tried, it is a bit difficult to suggest a solution. If you are still unable to get this to work, could you provide an example of your present code and data if necessary? > > > > Jim > > > > On Mon, Apr 27, 2020 at 3:09 AM Blume Christine <christine.blume at sbg.ac.at<mailto:christine.blume at sbg.ac.at>> wrote: > >> > >> I am using the 'coin' package to compute bootstrapped correlations. I am able to extract the p-value with confidence intervals as well as the test statistic Z. However, I am unable to find rho, i.e. the correlation coefficient. Can someone help? > >> > >> Kind regards, > >> Christine > >> > >> > >> [[alternative HTML version deleted]] > >> > >> ______________________________________________ > >> R-help at r-project.org<mailto:R-help at r-project.org> mailing list -- To >> UNSUBSCRIBE and more, see > >> 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. > > [[alternative HTML version deleted]] > > ______________________________________________ > R-help at r-project.org mailing list -- To UNSUBSCRIBE and more, see > 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.