similar to: Noncentral dt() with tiny 'x' values (PR#8874)

Dear List: The square of the noncentral t-statistic with noncentrality parameter \delta is a noncentral F with noncentrality parameter \lambda=\delta^2. So, t^2_{\nu,\delta} = F_{1,\nu,\lambda=\delta^2}. Consequently, it should follow that t^2_{1-\alpha/2,\nu,\delta} = f_{1-alpha,1,\vu,\lambda=\delta^2}. However, this is not what is happening with the following code. The central

Hello I could not find whether there is any R-function that implements the inverse of a noncentral Beta. Could someone out there tell me where I can find it? Or how to implement it? Many thanks Ed [[alternative HTML version deleted]]

Hi there: I'd thought these two versions of noncentral t-distribution are essentially the same: > qqplot(rt(1000,df=20,ncp=3),qt(runif(1000),df=20,ncp=3)) But, the scales of the x-axis and the y-axis are quite different according to the QQ-plot. Did I make any mistakes somewhere? Thanks, Long ---------------------------------

Full_Name: Long Qu Version: 2.3.1 OS: Windows XP Submission from: (NULL) (64.113.93.235) The QQ-plot of two versions of simulating noncentral F-distributed random numbers has quite different scales: > qqplot(rf(1000,2,15,3),qf(runif(1000),2,15,3)) The rf() function reads: > rf function (n, df1, df2, ncp = 0) { if (ncp == 0) .Internal(rf(n, df1, df2)) else rchisq(n, df1,

Hi, Actually I am facing a similar problem. I would like to fit both an ordinary (symmetric) and a non-central t distribution to my (one-dimensional) data (quite some values.. > 1 mio.). For the symmetric one, fitdistr or funInfoFun (using fitdistr) from the qAnalyst package should do the job, and for the non-central one.. am I right to use gamlss(x ~ 1, family=GT()) ? Anyway, I am a little

For those who are interested, I have made available a R function for noncentral hypergeometric distribution at http://www.geocities.com/jg_liao/software/Hypergeometric/hypergeometric_in_R.txt The paper that describes the algorithm will appear in The American Statistician. The function does not run on S-plus as the R's scoping rule is used. Here is how the function can be used: > n1

Does anybody have any experience fitting data to the non-central chi-squared or chi-squared distribution? I am trying to fit some data to this distribution but there is error after error. audaces fortuna iuvat --------------------------------- [[alternative HTML version deleted]]

Hi, I would like to know if there is a program written in R to get the CDF (cumulative distribution function) of a bivariate non-central chi-square distribution. Hope someone will reply. Thank you, Rossita M Yunus yunus@usq.edu.au This email (including any attached files) is confidentia...{{dropped:19}}

Hi, I have written out the log-likelihood function to fit some data I have (called ONES20) to the non-central chi-squared distribution. >library(stats4) >ll<-function(lambda,k){x<-ONES20; 25573*0.5*lambda-25573*log(2)-sum(-x/2)-log((x/lambda)^(0.25*k-0.5))-log(besselI(sqrt(lambda*x),0.5*k-1,expon.scaled=FALSE))} > est<-mle(minuslog=ll,start=list(lambda=0.05,k=0.006))

I have a data with 236 observations. After plotting the histogram, I found that it looks like non-central t distribution. I would like to get MLE for mu and df. I found an example to find MLE for gamma distribution from "fitting distributions with R": library(stats4) ## loading package stats4 ll<-function(lambda,alfa) {n<-200 x<-x.gam

Hello all. It seems that the pf() function when used with noncentral parameters can behave badly at times. I've included some examples below, but what is happening is that with some combinations of df and ncp parameters, regardless of how large the quantile gets, the same probability value is returned. Upon first glance noncentral values greater than 200 may seem large, but they are in

hello R-friends, I'm looking for a quantile function for the noncentral f-distribution in the area of equivalence hypotheses testing. Can somebody help me? Many thanks ----------------------------------------------------------------- Dipl. Inform. J. Hedderich Institut f?r Medizinische Informatik Phone : 0431 / 5973182 und Statistik im Klinikum an der CAU

Hi everyone. I have a problem that I have been unable to determine either the best way to proceed and why the methods I'm trying to use sometimes fail. I'm using the pf() function in an optimization function to find a noncentrality parameter that leads to a specific value at a specified quantile. My goal is to have a general function that returns the noncentrality parameter that

This patch enables the uniperif players 2 & 3 for b2120 boards and also adds the "simple-audio-card" device node to interconnect the SoC sound device and the codec. Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com> Signed-off-by: Peter Griffin <peter.griffin at linaro.org> --- arch/arm/boot/dts/stihxxx-b2120.dtsi | 45 ++++++++++++++++++++++++++++++++++++ 1

This patch adds the DT node for the uniperif reader IP block found on STiH407 family silicon. Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com> Signed-off-by: Peter Griffin <peter.griffin at linaro.org> --- arch/arm/boot/dts/stih407-family.dtsi | 26 ++++++++++++++++++++++++++ 1 file changed, 26 insertions(+) diff --git a/arch/arm/boot/dts/stih407-family.dtsi

This patch adds the dt node for the internal audio codec IP. Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com> Signed-off-by: Peter Griffin <peter.griffin at linaro.org> --- arch/arm/boot/dts/stih407-family.dtsi | 7 +++++++ 1 file changed, 7 insertions(+) diff --git a/arch/arm/boot/dts/stih407-family.dtsi b/arch/arm/boot/dts/stih407-family.dtsi index 45cab30..d1258d5

These nodes are required to get the fdma driver working on STiH407 based silicon. Signed-off-by: Peter Griffin <peter.griffin at linaro.org> --- arch/arm/boot/dts/stih407-family.dtsi | 52 +++++++++++++++++++++++++++++++++++ 1 file changed, 52 insertions(+) diff --git a/arch/arm/boot/dts/stih407-family.dtsi b/arch/arm/boot/dts/stih407-family.dtsi index d294e82..45cab30 100644 ---

Hi Lee, Thanks for reviewing and your very valuable feedback. On Tue, 30 Aug 2016, Lee Jones wrote: > On Fri, 26 Aug 2016, Peter Griffin wrote: > > > This patch adds the DT node for the uniperif reader > > IP block found on STiH407 family silicon. > > > > Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com> > > Signed-off-by: Peter Griffin

This patch adds the DT nodes for the uniperif player IP blocks found on STiH407 family silicon. Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com> Signed-off-by: Peter Griffin <peter.griffin at linaro.org> --- arch/arm/boot/dts/stih407-family.dtsi | 76 +++++++++++++++++++++++++++++++++++ 1 file changed, 76 insertions(+) diff --git a/arch/arm/boot/dts/stih407-family.dtsi

On Fri, 26 Aug 2016, Peter Griffin wrote: > This patch adds the DT nodes for the uniperif player > IP blocks found on STiH407 family silicon. > > Signed-off-by: Arnaud Pouliquen <arnaud.pouliquen at st.com> > Signed-off-by: Peter Griffin <peter.griffin at linaro.org> > --- > arch/arm/boot/dts/stih407-family.dtsi | 76 +++++++++++++++++++++++++++++++++++ > 1