adana (version 1.1.0)

ilmdhc: ILM/DHC adaptation function

Description

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).

Usage

ilmdhc(g, gmax, ...)

Arguments

g

Current generation

gmax

Maximum generation

…

Further arguments passed to or from other methods.

Value

pc

Crossover rate

pm

Mutation rate

References

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.

See Also

fixpcmut, adana1, adana2, leitingzhi, adana3

Examples

# 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)
# }