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Ibeta
Incomplete beta function.
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Loading LOADSUB ALL FROM "IGAMMA.HTS"
or LOADSUB FROM "MATHLIB.HTS"
Usage REAL A,B,X,Y
Y=FNIbeta(A,B,X)
Description
Ibeta returns the value of the incomplete beta function of a, b, and x, Bx(a,b). This function is only defined for values of a 0, b 0, and 0 x 1.
Bx(a,b) is defined by the expression
Another form of the incomplete beta function, Ix(a,b), is defined by the expression
This function is evaluated by the routine P_beta.
Errors
Ibeta causes an HTBasic error if its arguments are not all of type REAL, if x < 0, x > 1, a 0, or b 0.
See Also
P_beta
Bx(a,2.5)
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