QLOGIS_H - High-tail inverse logistic distribution

The QLOGIS_H function returns the value x of a variable that follows the logistic distribution for which the probability of being greater than x is equal to the specified percentage.

Syntax

IDAX.QLOGIS_H(DOUBLE percentage, DOUBLE mean, DOUBLE
scale)

Parameter descriptions

percentage: Mandatory.; The requested limit of the percentage.; If percentage is not in the range of 0 - 1, QLOGIS_H(percentage,mean,scale) is null for all mean values and positive scale values.; Min: 0.00000000001; Max: 0.99999999999; Data type: DOUBLE
mean: Mandatory.; The mean value of the distribution.; Data type: DOUBLE
scale: Mandatory.; The scale of the distribution.; If scale is 0 or less, QLOGIS_H(percentage,mean,scale) is null for all percentage values and mean values.; Min: 0.000000001; Data type: DOUBLE

QLOGIS_H(perc,mean,scale)=QLOGIS(1-perc,mean,scale) for perc values in the range of 0 - 1, mean values, and positive scale values.

If PLOGIS_H(x,mean,scale)=perc, QLOGIS_H(perc,mean,scale)=x for all x values, mean values, positive scale values.

Returned information

DOUBLE the point x where PLOGIS_H(x,mean,scale)=percentage.