[R] How to calculate chi sqaure value from statistical value and degrees of freedom?

[Özgür Asar]

Hi,

Actually, pchisq(q,df) calculates the cumulative distribution function by
default.

To calculate the p-value, you can use either

1-pchisq(q,df)

or

pchisq(q,df,lower.tail=FALSE)

PS: I checked, the p value yielded by R and the calculator for which you
give a link, for some "q" and "df" values, and these two are same.

Best
Ozgur

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