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[Octave-bug-tracker] [bug #39636] nbinpdf has floating point error
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From: |
Marco Caliari |
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Subject: |
[Octave-bug-tracker] [bug #39636] nbinpdf has floating point error |
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Date: |
Thu, 01 Aug 2013 14:02:58 +0000 |
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User-agent: |
Mozilla/5.0 (X11; Linux i686; rv:13.0) Gecko/20100101 Firefox/13.0 |
Follow-up Comment #8, bug #39636 (project octave):
Hi,
why not to change the relevant part in nbinpdf.m to
if (isscalar (n) && isscalar (p))
pdf(k) = bincoeff (x(k) + n - 1, x(k)) .* (p ^ n) .* ((1 - p) .^ x(k));
else
pdf(k) = bincoeff (x(k) + n(k) - 1, x(k)) .* (p(k) .^ n(k)) .* ((1 - p(k))
.^ x(k));
endif
according to the definition given in comment #2?
About bincoeff.m, I do not understand the formula given on line 92. Where does
it come from?
Marco
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