Running a Full Factorial DoE using user generated inputs

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Andrew Dodd
Andrew Dodd 2015-11-10
评论： Image Analyst 2015-11-10
I have written a program in which the user loads a given definition file and then runs that definition file through a series of functions to produce a desired result.
Added to this, I have made a GUI that allows the user to select certain parameters of that definition file and define a minimum value, a maximum value, and a number of steps between the two. Once the user finishes defining those selected parameters, the GUI runs the original program through each parameter range individually.
What I am trying to do is enable this GUI to run all the defined parameters simultaneously, essentially following a full factorial approach. I am having a hard time figuring out how to essentially make a self generating for loop that adds an index for each selected parameter. Anyone have any suggestions?

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回答（1 个）

Image Analyst
Image Analyst 2015-11-10
You mean like a nested for loop:
for p1 = p1Start : p1Step : p1End
for p2 = p2Start : p2Step : p2End
for p3 = p3Start : p3Step : p3End
out = RunExperiment(p1,p2,p3); % Do your code (call your function(s))....
end
end
end
This will do every specified combination of the 3 parameters.
  2 个评论
Andrew Dodd
Andrew Dodd 2015-11-10
That's what I'm trying to do, but want to be able to run between 1-45 different parameters. And it could be any value in between the two.
Image Analyst
Image Analyst 2015-11-10
If you have 45 different parameters, and say each one takes on 10 values, then you'd have 10^45 different permutations. That would take a billion billion billion billion billion runs of your functions. So assuming your code runs in about a second, you could get through all of your experiments in about 7*10^38 years or about a 100 billion billion billion times the age of the universe. Are you prepared to wait that long?
For more reasonable numbers, like varying 2 or 3 parameters, you could also use meshgrid() instead of for loops. I don't know of any other way to handle varying the number of parameters you want to vary except to use all 45 in a gigantic nest and just have the ones you don't want to vary have the same starting and stopping values.

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