How to set or choose a fitness function/objective function?

I am using cuckoo search for a search optimization problem.Now i want to choose or build a fitness function.How to make it in cuckoo search?

Answer 1

[Walter Roberson]

You do not. You provide a fitness function (objective function) that, given a particular vector of inputs, returns a measure of the fitness for that combination of parameters. Cuckoo Search uses the returned values but processes them a variety of different ways to figure out where might be most productive to search. The fitness function / objective function does not change at all: what changes is how the returned information is used to make decisions.

See for example https://www.mathworks.com/matlabcentral/fileexchange/59249-segmention-of-images-using-a-modified-cuckoo-search--csmcculloch--algorithm