Log Normal Distribution

Distributions associated with the Log-Normal Equation:

dlnorm(x, μ, σ) Returns the probability density for value x.

plnorm(x, μ, σ) Returns the cumulative probability distribution for value x.

qlnorm(p, μ, σ) Returns the inverse cumulative probability distribution for probability p.

rlnorm(m, μ, σ) Returns a vector of m random numbers having the log normal distribution.

Arguments:

• x is a scalar or vector of real values greater than or equal to 0. To allow integration and other operations over this argument, values outside of the stated range are allowed, but they produce a 0 result.
• μ is a real mean of the natural logs of x.
• σ is a real standard deviation of the natural logs of x, greater than 0.
• p is a real probability between 0 and 1.
• m is an integer greater than 0.

Notes:

• For definitions of the functions, and information on generating random numbers, see the Density and Distribution definitions.