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However, Differential
Evolution - A Practical Approach to Global Optimization (the book written by Storn and Price, creators of the algorithm), suggests that functions from the integers should be use floating point variables that are rounded to the nearest acceptable variable. Otherwise, the value of
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The first sentence of the history section seemed to taken from one of the sources and should be rewritten. I commented it out for now. The rest of the article seems ok to me wrt copyvio; were there any other passages that came from another source? Also, can you be more specific out the context issue?
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This article doesn't read only as someone's essay, but is moreover a copy-paste-product from the referenced website. I currently write my diploma about evolutionary algorithms and even I did not fully understand the essence of DE. I support the strong doubts that someone unfamiliar may have just a
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The use of a linked list to store the population makes no sense. An array would be far better. The population never changes size while the program is running, and there algorithm does need to access arbitrary elements of the population during the crossover stage. Both suggest the use of an array,
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I think this article should describe where the term 'differential' stems from as my first thought was "Well, since it carries 'differential' in its name, it must use some sort of gradient". However, that does not seem to be the case. Thus, we require an explanation on this.
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F is limited to being 1. Further, if you use integer data points, you can encounter a situation where a valid data point is never reached. The example they give is a function defined on odd integers as well as 2. Since F=1, you will never reach 2 as a data point.
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There's already a pseudocode listing in the section titled "Algorithm". I'll update the heading to indicate this is a code sample. Regarding your concerns about the assumptions in the code, that needs further investigation. ←
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For example which terms were not clear from the context? I'm removing the Essay tag as it doesn't seem to be supported by your comment. Again, please be more specific if you add it back in.--
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Isn't evolution by itself iterative? I really wonder if there is any difference bw DE and the other older well-known and popular algorithms. They all base on populations and iterations!!
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I think we need a more detailed explanation of the meaning and implications of the "performance landscape", as well as a description of the rules of thumb of parameter selection.
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Individual{ //normally DifrentialEvolution uses floating point variables var float data1,data2 //but using integers is possible too var integer data3
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introduces modulo bias and will never select the last element of the list (it should be %population.size(), since the floor function is being used).
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The definition at the beginning of the article is the same the one used in the
Metaheuristic article and is therefore too general.
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I recommend a total rewrite. I would love to do it but I have a very tight time plan to write my diploma. Someone else may be?
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which allows constant time access, while a linked list must iterate through the elements.
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There are a few issues with the code provided in this article.
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