Dear R helpers:
Thanks for the previous reply. I am using Friedman racing test. According the the book "Pratical Nonprametric Statistic" by WJ Conover, after computing the statistics, he suggested to use chi-squared or F distribution to accept or reject null hypothesis. After looking into the source code, I found that R uses chi-sqaured distribution as below: PVAL <- pchisq(STATISTIC, PARAMETER, lower = FALSE) but still I cant figure out why they are using this pschisq insted of dchisq. Sorry I am wrong!! Thanking you truly Prasanna > >----- Original Message ----- >From: "Dimitris Rizopoulos" <[EMAIL PROTECTED]> >To: "Prasanna Balaprakash" <[EMAIL PROTECTED]> >Cc: <r-help@stat.math.ethz.ch> >Sent: Friday, January 21, 2005 1:05 PM >Subject: Re: [R] chi-Squared distribution > > >> if you check ?qchisq, you'll see that the second > >My mistake, the third argument > >> argument of the function denotes the non-centrality parameter! Try >> >> qchisq(0.75, 1:3) >> >> to get your answer. >> >> Best, >> Dimitris >> >> ---- >> Dimitris Rizopoulos >> Ph.D. Student >> Biostatistical Centre >> School of Public Health >> Catholic University of Leuven >> >> Address: Kapucijnenvoer 35, Leuven, Belgium >> Tel: +32/16/336899 >> Fax: +32/16/337015 >> Web: http://www.med.kuleuven.ac.be/biostat >> http://www.student.kuleuven.ac.be/~m0390867/dimitris.htm >> >> >> ----- Original Message ----- >> From: "Prasanna Balaprakash" <[EMAIL PROTECTED]> >> To: <r-help@stat.math.ethz.ch> >> Sent: Friday, January 21, 2005 12:27 PM >> Subject: [R] chi-Squared distribution >> >> >>> Dear Rs: >>> >>> >>> outer(1:3, 1:3, function(df1, df2) qf(0.95, df1, df2)) >>> >>> I compare this F distribution results with the table, the answers >>> were perfect. But I need to see for chi-sqaured distribution. When >>> I employed the similar formula >>> >>> outer(1:3, 1:3, function(df1, df2) qchisq(0.95, df1, df2)) , I am >>> getting unexpected results. I need to see the following values: >>> >>> p=0.750 ..... >>> 1 1.323 >>> >>> 2 2.773 >>> >>> 3 4.108 >>> >>> >>> Thanking you >>> Prasanna >>> >>> >>> >>> >>> >>> >>> Prasanna Balaprakash, >>> Université Libre de Bruxelles, >>> 50, Av. F. Roosevelt, CP 194/6, >>> B-1050 Brussels, >>> Belgium. >>> >>> ______________________________________________ >>> R-help@stat.math.ethz.ch mailing list >>> https://stat.ethz.ch/mailman/listinfo/r-help >>> PLEASE do read the posting guide! >>> http://www.R-project.org/posting-guide.html ______________________________________________ R-help@stat.math.ethz.ch mailing list https://stat.ethz.ch/mailman/listinfo/r-help PLEASE do read the posting guide! http://www.R-project.org/posting-guide.html