Statistics/Chi-squared distribution: Difference between revisions
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change function names to reflect text at top
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end
""" gamma CDF from lower incomplete gamma function, using MPFR library to get upper incomplete gamma """
function
z, biga, bigx = BigFloat(), BigFloat(a), BigFloat(x)
ccall((:mpfr_gamma_inc, :libmpfr), Int32, (Ref{BigFloat}, Ref{BigFloat}, Ref{BigFloat}, Int32), z, biga, bigx, 0)
Line 105:
""" Cumulative probability function (cdf) for chi-squared """
function cdf_χ2(x, k)
return x <= 0 || k <= 0 ? 0.0 :
end
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