The quantile function is just the inverse of the distribution function, so
if you have the latter you can always get the former, e.g by simple
interpolation using approx(). Assuming you can't find it already written
for you of course.
Bert
On Feb 20, 2017 7:15 AM, "li li" wrote:
> Hi all,
>
Hi all,
Is there a function in R that can calculate the quantiles or percentiles
for the weighted sum of independent chi square random variables. I found a
few functions for calculating probability distribution function for such
random variables (e.g. pchisqsum..), but can not find any function
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