[R] chi square table

Erik Iverson iverson at biostat.wisc.edu
Fri Nov 7 03:02:32 CET 2008


 > qchisq(0.01, df = 8, lower.tail = FALSE)
[1] 20.09024


cruz wrote:
> Hi,
> 
> How do we get the value of a chi square as we usually look up on the
> table on our text book?
> 
> i.e. Chi-square(0.01, df=8), the text book table gives 20.090
> 
>> dchisq(0.01, df=8)
> [1] 1.036471e-08
>> pchisq(0.01, df=8)
> [1] 2.593772e-11
>> qchisq(0.01, df=8)
> [1] 1.646497
> 
> nono of them give me 20.090
> 
> Thanks,
> cruz
> 
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