# MethodError: no method matching binomial

#1

Dear all,

How can I fix MethodError: no method matching binomial:

pr = 5.6783
for i = 1:round(pr/2)
n = 1/binomial(pr,i)
end

Best

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#2

Second, it is unclear what you are expecting from binomial when called with a Float64 and an Int; as Base.binomial is for calculating n \choose k. Perhaps you are interested in

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#3

why do we need to install a third part package in PC, quit complex for such very simple problem ?

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#4

Because there are almost infinitely many problems that people consider simple, and they can’t all be covered in Base and the standard libraries.

Also, you are mistaken: installing packages is not complex, it is a very simple operation.

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#5

I don’t know if that’s what’s expected here, but the usual generalization of binomial coefficients to non-integer upper index is

{r \choose k} = \frac{r(r-1) \ldots (r-k+1)}{k!}.
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