provided by the plugin Growthfunctionlibrary

A set of growth functions that follow the GroIMP standard of math functions and can be used through the function explorer.

The panel allows users to brows and customize growth functions.

• add: Adds the currently selected growth function with the current parameters as a function to the function explorer
• update: If the same function is selected (e.g. in the explorer) the current parameters are pushed to the selected function
• Functions: Open the function explorer

The growth function can be treated as an java object and then address using the index operator.

import de.grogra.growthfunctionlibrary.functions.GompertzI;
public void run(){
 GrowthFunctionBase f = new GompertzI(100.0,3.0,0.12);
	for(int x = 0; x < 10; x++){
		println(f[x]);
	}
}

It is also possible to use a GrowthFunctionBase object as a field for a node or class:

import de.grogra.growthfunctionlibrary.functions.GompertzI;
module Bud(int age, GrowthFunctionBase f);
protected void init()[
Axiom ==> Bud(0,new GompertzI(100.0,3.0,0.12));
]
 
public void grow()[
	Bud(a,f) ==> F(f[a]) Bud(a+1,f);
]

This allows us to edit or change the growth function for each bud during the simulation

A growth function can also be added to the function explorer (Panels → Explorers → Math → Functions) After it is added it can be referenced from rgg using this code:

function("name")[3]