IDAX.PLOGIS - Cumulative logistic distribution

The PLOGIS function returns the probability that the value of a variable that follows the logistic distribution is smaller or equal to x.

Syntax

IDAX.PLOGIS(DOUBLE x, DOUBLE mean, DOUBLE scale)

x: Mandatory.; The value that is to be computed.; 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, PLOGIS(x,mean,scale) is null for all x values and mean values.; Min: 0.000000001; Data type: DOUBLE

PLOGIS(x,mean,scale)=1./(1+exp(-(x-mean)/scale)) for all x values and mean values, and for all positive scale values.

DOUBLE the cumulative probability distribution from minus infinity to point x.