Generalised logistic function (Richards' curve)
Description
A logistic function or logistic curve is a common “S” shape (sigmoid curve) The generalized logistic curve or function, also known as Richards’ curve is a widely-used and flexible sigmoid function for growth modelling, extending the logistic function.
Related formulasVariables
| Y(t) | weight, height, size etc. (dimensionless) |
| A | the lower asymptote (dimensionless) |
| K | the upper asymptote. If A=0 then K is called the carrying capacity (dimensionless) |
| Q | depends on the value Y(0) (dimensionless) |
| e | e |
| B | the growth rate (dimensionless) |
| t | time (dimensionless) |
| M | the time of maximum growth if Q=ν (dimensionless) |
| v | ν>0 : affects near which asymptote maximum growth occurs. (dimensionless) |