How to create an algorithm?

Answer 1

Depends on what you want the algorithm to do.

Answer 2

You'd either create one or improving one. First and foremost, find an expert in your target field and get some advice . Then:

1. Define what kind of algorithm it should be.
2. Do reseach on papers related to your previously defined algorithm.
3. gather your results.
4. Go through some experiment.
5. make a document of your experiments.
6. publish a draft as a proposal

Answer 3

there are few steps to follow.
1. initialization
2.main logic
3.end

these steps should be well defined as per the code requirements. you should follow the code flow. an algorithm is predefinition, working view of your code.