BETADIST parameter Cumulative

Hi,

Our definition of BETADIST currently has a 6th optional parameter
Logical Cumulative = TRUE() that is not supported by any of the "usual"
applications. If FALSE(), BETADIST is supposed to return the value of
the probability density function. If TRUE(), the value of the cumulative
distribution function, which is what applications do. Additionally it
doesn't have the constraint a <= x <= b that applications have, and
explicitly says so.

Where did that originate from?

I propose to remove that parameter and to add the constraint, otherwise
the function would be incompatible with all applications, it seems.

  Eike

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