IDAX.QBETA - Inverse beta distribution

The QBETA function returns the value x of a variable that follows the beta distribution for which the probability of being smaller or equal to x is equal to the specified percentage.

Syntax

IDAX.QBETA(DOUBLE percentage, DOUBLE shape, DOUBLE
shapeTwo)

Parameter descriptions

percentage: Mandatory.; The requested limit of the percentage.; If percentage is not in the range of 0 - 1, QBETA(percentage,shapeOne,shapeTwo) is null for all shapeOne values and shapeTwo values.; Min: 0.00000000001; Max: 0.99999999999; Data type: DOUBLE
shapeOne: Mandatory.; The first shape of the distribution.; If shapeOne is 0 or less, QBETA(percentage,shapeOne,shapeTwo) is null for all percentage values.; Min: 0.00000000001; Data type: DOUBLE
shapeTwo: Mandatory.; The second shape of the distribution.; If shapeTwo is 0 or less, QBETA(percentage,shapeOne,shapeTwo) is null for all percentage values.; Min: 0.00000000001; Data type: DOUBLE

If PBETA(x,shapeOne,shapeTwo)=perc, QBETA(perc,shapeOne,shapeTwo)=x for x values in the range of 0 - 1, positive shapeOne values, and positive shapeTwo values.

Returned information

DOUBLE the point x, where PBETA(x,shapeOne,shapeTwo)=percentage.