[R] chi-Squared distribution

[Dimitris Rizopoulos]

----- 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 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" <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,
>> Université Libre de Bruxelles,
>> 50, Av. F. Roosevelt, CP 194/6,
>> B-1050 Brussels,
>> Belgium.
>>
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>