Generalised logistic curve

The generalised logistic (or Richard's) curve is a widely used and flexible function for growth modelling.

where Y = weight, height, size etc., and X = time.

It has five parameters:

A

the lower asymptote;

C

the upper asymptote minus A;

M

the time of maximum growth;

B

the growth rate;

T

affects near which asymptote maximum growth occurs.

See also

• Logistic function