logistic5_fn {drda}  R Documentation 
Evaluate at a particular set of parameters the 5parameter logistic function.
logistic5_fn(x, theta)
x 
numeric vector at which the logistic function is to be evaluated. 
theta 
numeric vector with the five parameters in the form

The 5parameter logistic function f(x; theta)
is defined here as
alpha + (beta  alpha) / (1 + nu * exp(eta * (x  phi)))^(1 / nu)
where theta = c(alpha, beta, eta, phi, nu)
, beta > alpha
, and nu > 0
.
Numeric vector of the same length of x
with the values of the
logistic function.