Created by W.Langdon from gp-bibliography.bib Revision:1.6567
A novel set of extensions to Montana's Strongly Typed Genetic Programming system are presented that provide a mechanism for constraining the structure of program trees. It is demonstrated that these constraints are sufficient to evolve programs with a naturally imperative structure and to support the use of many common high-level imperative language constructs such as loops. Further simple algorithm modifications are made to support additional constructs, such as variable declarations that create new limited-scope variables. Six non-trivial problems, including sorting and the general even parity problem, are used to experimentally compare the performance of the systems and configurations proposed.
Software metrics are widely used in the software engineering process for many purposes, but are largely unused in GP. A detailed analysis of evolved programs is presented using seven different metrics, including cyclomatic complexity and Halstead's program effort. The relationship between these metrics and a program's fitness and evaluation time is explored. It is discovered that these metrics are poorly suited for application to improve GP performance, but other potential uses are proposed.",
3.4.1 Factorial, 3.4.2 Fibonacci, 3.4.3 Even-n-parity, 3.4.4 Reverse List, 3.4.5 Sort List, 3.4.6 Triangle
6.4.2 Program Tree Length, 6.4.3 Program Tree Depth, 6.4.4 Number of Statements, 6.4.5 Cyclomatic Complexity, 6.4.6 Halstead's Effort, 6.4.7 Prather's Measure \mu, 6.4.8 NPATH Complexity
p150-151 'Our results confirmed previous findings that many complexity metrics correlate highly with program size and there was also high correlation with each other, suggesting that they are measuring similar properties. Little consistency was seen in the trends between the complexity metrics and the fitness. It was concluded that the complexity metrics used in this study do not have qualities that would make them suitable for applications to improve fitness or evaluation time in GP.'
Mention on StackOverflow https://stackoverflow.com/questions/22194786/can-any-existing-machine-learning-structures-perfectly-emulate-recursive-functio
Genetic Programming entries for Tom Castle