R.DCHISQ(x,df,give_log)
x: observation
df: the number of degrees of freedom of the distribution
give_log: if true, log of the result will be returned instead
This function returns the probability density function of the chi-square distribution.
A two argument invocation R.DCHISQ(x,df) is exported to OpenFormula as CHISQDIST(x,df,FALSE()).