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Table 4 General parameter settings for the GP experiment

From: Spatial distribution estimation of malaria in northern China and its scenarios in 2020, 2030, 2040 and 2050

Parameters Descriptions and values
Terminal set Variables X1, X2, X3, X4, and X5
Function set +, −, × ,/, power, log, exp, sqrt
Population size 200 individuals
Generations 1000
Fitness function type Sum of absolute difference (SAD)
Genetic operators Crossover, mutation
Initialization [0.85, 0.15]
Operators probability Variable
Tree depth Dynamic depth selection
Dynamic max depth 15
Real max tree depth 17
Selection method Lexictour
Survival Totalelitism (elistism)