Initial Population Generation Methods for population generation: Grow Full Ramped Half-and-Half Variety – Genetic Diversity

The Grow Method Trees generated are of a variable size. Labels for nodes at levels less than the maximum depth are chosen from both the function and terminal sets. Labels for nodes at the maximum depth are chosen from the terminal set.

The Full Method Every tree has the same shape and size. Labels for nodes at a depth less than the maximum depth are chosen from the function set only. Labels for nodes at the maximum depth are chosen from the terminal set.

Ramped Half-and-Half Produces trees of various shapes and sizes. Combines both the full and grow methods. An equal number of trees for each depth in the range of 2 to the maximum depth is generated. For each depth value half the trees will be generated using the full method and the other half using the grow method. Produces a diverse population.

Ramped Half-and-Half Example Population size : 30Maximum Tree Depth : 6 How many trees of each depth will be created? How many trees will be created using the full method? How many trees will be created using the grow method? 30 trees 30/ 5 = 6 trees of each depth 5*3 trees generated using grow 5*3 trees generated using full

GP Parameters Population Size Maximum tree Depth Method of Initial Population Generation Parameters are varied in an attempt to find a solution. Remember to store the random generator seed for each run.