Record best solution in each GA generation running with UseParallel=true

Question

Mitsu 2021-1-17

1
链接

此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/718930-record-best-solution-in-each-ga-generation-running-with-useparallel-true

评论： Star Strider 2021-2-8

Hello,

Is there a way to record the best solution at each generation running with parallelization? (that is, with UseParallel=1)

I used outputFcn_global (from File Exchange), but it uses a global variable to record the info. In each generation, I would like to use the output function to just record the best solution (e.g. 1x1000 array) in the population. Since my objective function is a combination of several things, I need the best solution of each generation to then calculate the value of each term in the fitness function separately, and see how the objectives evolve over the generations.

Is there a way to do that without global variables?

0 个评论
显示 -2更早的评论隐藏 -2更早的评论

请先登录，再进行评论。

请先登录，再回答此问题。

Answer 1

Star Strider 2021-1-17

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/718930-record-best-solution-in-each-ga-generation-running-with-useparallel-true#answer_599715

See: How to save data from Genetic Algorithm in case MATLAB crashes? That will likely do what you want. Define it as the output function 'OutputFcn',@SaveOut.

2 个评论
显示无隐藏无

Mitsu 2021-2-8

Finally got back to work on this, sorry for not upvoting earlier.

Thank you! I misunderstood what the output function does, and thought it was not compatible with parallelizing the optimizer. Since the output function is called only once during each iteration, it works fine!