Can Prism fit growth equations?

Prism can fit any model that expresses Y as a function of X and some parameters. We can only supply a few equations built in.

We are not experts on growth functions, but have prepared this file which has examples of the Gompertz, logistic, Weibul, Malthusian and beta growth functions. The last one (beta) is least known. It comes from equation 8 of the reference below, which cites many other papers on growth functions. The file can be opened with Prism 4 or later.

To move any equation to your own user-defined list, open the parameters dialog for the equation, go to the equation tab, click the button to edit the equation, and then OK twice. 

Yin et al. A flexible sigmoid function of determinate growth. Ann Bot (2003) vol. 91 (3) pp. 361-71,