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, Universit? Libre de Bruxelles, 50, Av. F. Roosevelt, CP 194/6, B-1050 Brussels, Belgium.
if you check ?qchisq, you'll see that the second 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: med.kuleuven.ac.be/biostat student.kuleuven.ac.be/~m0390867/dimitris.htm ----- Original Message ----- From: "Prasanna Balaprakash" <pbalapra at ulb.ac.be> To: <r-help at 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, > Universit? Libre de Bruxelles, > 50, Av. F. Roosevelt, CP 194/6, > B-1050 Brussels, > Belgium. > > ______________________________________________ > R-help at stat.math.ethz.ch mailing list > stat.ethz.ch/mailman/listinfo/r-help > PLEASE do read the posting guide! > R-project.org/posting-guide.html >
----- Original Message ----- From: "Dimitris Rizopoulos" <dimitris.rizopoulos at med.kuleuven.ac.be> To: "Prasanna Balaprakash" <pbalapra at ulb.ac.be> Cc: <r-help at 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 secondMy 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: med.kuleuven.ac.be/biostat > student.kuleuven.ac.be/~m0390867/dimitris.htm > > > ----- Original Message ----- > From: "Prasanna Balaprakash" <pbalapra at ulb.ac.be> > To: <r-help at 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, >> Universit? Libre de Bruxelles, >> 50, Av. F. Roosevelt, CP 194/6, >> B-1050 Brussels, >> Belgium. >> >> ______________________________________________ >> R-help at stat.math.ethz.ch mailing list >> stat.ethz.ch/mailman/listinfo/r-help >> PLEASE do read the posting guide! >> R-project.org/posting-guide.html >> >