How to create a loop to run my training dataset 1000 times?

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Robin Li 2019-5-1

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https://ww2.mathworks.cn/matlabcentral/answers/459507-how-to-create-a-loop-to-run-my-training-dataset-1000-times

评论： KSSV 2019-5-1

I have my training dataset randomly selected from 80% of my (x,y) time-series, and my goal is to do polynomial curve fitting from degree one to four and find the best fitting looking at each RMSE

Screen Shot 2019-05-01 at 9.28.20 AM.png

So my "training" is different subset of my whole dataset each time I run the command.

Screen Shot 2019-05-01 at 9.28.26 AM.png

and each of the RMSE is also different for the same reason.

My goal is to run the whole session 1000 times and then find the average of each RMSE. For example, to have mean_RMSE1=sum of all RMSE1/1000 and so on. I want to select the smallest mean_RMSE over the four alternatives.

So how could I write the syntax to achieve this purpose?