Jim Silverton gmail.com> writes:
>
> I want to fit some p-values to a beta distribution. But the problem is some
> of the values have 0s and 1's. I am getting an error if I use the MASS
> function to do this. Is there anyway to get around this?
The probability *density* of an exact 0 or 1 can
If yoy write out the likelihood equations for an independent sample size n from
the beta(a,b) distribution:
L \propto \prod_i dbeta(y_i,a,b)
log(L) = constant + \sum_i dbeta(y_i,a,b,log=TRUE)
log(L)= constant + \sum_i (a-1) log(y_i) + (b-i) log(1-y_i)
you see that your problem comes from trying to
I want to fit some p-values to a beta distribution. But the problem is some
of the values have 0s and 1's. I am getting an error if I use the MASS
function to do this. Is there anyway to get around this?
--
Thanks,
Jim.
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