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http://www.openoffice.org/issues/show_bug.cgi?id=99224
Issue #|99224
Summary|Wrong domain for x in HYPGEOMDIST
Component|Spreadsheet
Version|DEV300m41
Platform|PC
URL|
OS/Version|Windows XP
Status|UNCONFIRMED
Status whiteboard|
Keywords|
Resolution|
Issue type|DEFECT
Priority|P3
Subcomponent|code
Assigned to|spreadsheet
Reported by|regina
------- Additional comments from reg...@openoffice.org Sat Feb 14 14:09:03
+0000 2009 -------
Example: You have got an urn with M=6 white marbles and 4 black marbles, which
gives N=10 marbles total. Now draw n=5 marbles without replacement. Define the
random variable X as "number of white marbles in the draw". This random variable
has the domain {0,1,2,3,4,5}. For x=0 it should be P(X=0)=0, but OOo returns an
"invalid argument" error in this case.
The spec odf1.2 draft has only the constraints x<=M and x<=n and 0<=x on x.
Gnumeric returns 0 for HYPGEOMDIST(0;5;6;10).
@kohei: Will your algorithm break, if the part "(x < n - N + M)" is dropped (in
the condition in about line 1729 in interpr3.cxx)? Then a separate case
distinction is necessary.
The correction should be done, when HYPGEOMDIST will be extended to the
cumulative case as defined in spec odf1.2.
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