Main Page | See live article | Alphabetical index The generalised logistic (or Richard's) curve is a widely used and flexible function for growth modelling. where Y=weight, height, size etc; X = time. It has five parameters: ; A: the lower asymptote; ; C: the upper asymptote; ; M: the time of maximum growth; ; B: the growth rate; ; T: near which asymptote maximum growth occurs. This article is from Wikipedia. All text is available under the terms of the GNU Free Documentation License.