Erlang Command

Erlang( <Shape>, <Rate>, <Variable Value> ): Calculates the value of cumulative distribution function of an Erlang distribution at variable value v, i.e. the probability P(X ≤ v) where X is a random variable with an Erlang distribution defined by the parameters shape and rate.

This syntax returns the probability at a given value, that is the area under the Erlang distribution curve to the left of the given x-coordinate.

Erlang( <Shape>, <Rate>, <Variable Value>, <Boolean Cumulative> ): If Cumulative = true, calculates the value of the cumulative distribution function of an Erlang distribution with given shape and rate at the given variable value, otherwise it calculates the probability density function of the distribution at variable value.
Erlang( <Shape>, <Rate>, x, <Boolean Cumulative> ): If Cumulative = true, creates the cumulative density function (cdf) of an Erlang distribution with given shape and rate, othewise it creates the probability density function (pdf) of the distribution.