XLPack 7.0
XLPack Numerical Library (C API) Reference Manual
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◆ ibetacia()

double ibetacia ( double  b,
double  x,
double  q 
)

Normalized compliment of incomplete beta function 1 - Ix(a, b) inverse for a

Purpose
ibetacia returns a value a such that q = 1 - Ix(a, b), where q is the specified value of the normalized compliment of the incomplete beta function.
Returns
Value of a.
Parameters
[in]bArgument b. (b > 0)
[in]xArgument x. (0 < x < 1)
[in]qSpecified value of normalized compliment of incomplete beta function. (0 <= q <= 1)
Error handling
  • If b, x or q is NaN, NaN is returned and errno is not altered.
  • If b <= 0, x <= 0, x >= 1, q < 0 or q > 1, NaN is returned and domain error (EDOM) is reported.
  • Range error (ERANGE) may be reported.
Reference
boost/math/special_functions