ILM/DHC is an adaptive function with an increasing low mutation rate (ILM) and a decreasing high crossover rate (DHC) as the generation progresses (Hassanat et.al., 2019).
ilmdhc(g, gmax, ...)Current generation
Maximum generation
Further arguments passed to or from other methods.
Crossover rate
Mutation rate
Hassanat, A., Almohammadi, K., Alkafaween, E., Abunawas, E., Hammouri, A. and Prasath, V.B. (2019). Choosing mutation and crossover ratios for genetic algorithm: A review with a new dynamic approach. Information, 10(12), 390.
# NOT RUN {
N = 50
gmax = 1000
g = c(1, 10, 50, 100, 250, 500, 750, gmax)
pc = ilmdhc(g=g, gmax=gmax)$pc
pc
nc = round(pc*N)
nc
pm = ilmdhc(g=g, gmax=gmax)$pm
pm
nm = round(pm*N)
nm
nm = ifelse (!nm, 1, nm)
nm
plot(pm, type="l", col=4, lwd=2, lty=1, xaxt="n", ylab="Ratio", xlab="Generation")
lines(pc, type="l", col=2, lwd=2, lty=2)
legend("top", inset=.02, c("pm","pc"), col=c(4,2), lty=c(1,2), horiz=TRUE, cex=0.8)
axis(1, at=1:length(g),labels=g, col.axis="red", las=2)
# }
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