Way to pass to a function a random variable based on array

Question

Chris 2012-3-22

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/33130-way-to-pass-to-a-function-a-random-variable-based-on-array

I have a list of variables in my workspace as a string array. I want to call a function to test every combo

Unfortunately when i run as it currently is it passes the string of the varialbe name and not the variable in my workspace. I have tried using the eval command however I can't have the eval command work in a parfor loop. Unfortunately without parfor it is very slow to test.

parfor i = 1:10
   for j = i:10
      testprocedure(VarArray(i,1),VarArray(j,1))
   end
end

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Answer 1

Walter Roberson 2012-3-22

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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/33130-way-to-pass-to-a-function-a-random-variable-based-on-array#answer_41713

在 MATLAB Online 中打开

http://matlab.wikia.com/wiki/FAQ#How_can_I_create_variables_A1.2C_A2.2C....2CA10_in_a_loop.3F

I would suggest using a structure array in your case.

testprocedure( VarStruct.(VarArray{i}), VarStruct.(VarArray{j}) )

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Oleg Komarov 2012-3-22

I am seriously thinking to resume my post on how people should scale their projects, because inevitably they end up with eval.

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Answer 2

Chris 2012-3-23

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https://ww2.mathworks.cn/matlabcentral/answers/33130-way-to-pass-to-a-function-a-random-variable-based-on-array#answer_41871

Thanks, I guess I am a little confused though how to do.

So for example I have an array called TeamNames that contains all of the names of various teams. TeamNames(1,1) is called Bulls which is a variable in my matlab workspace. How do I pass Bulls to my function TestProcedure without using Eval? I want the forloop to loop through all TeamNames and run the test procedure on two teams at a time. Ideally using parfor since it is a lot faster. When I run the testprocedure(TeamNames(i,1),TeamNames,(j,1)) it passes the string of the variable rather than the matlab variable in my workspace. I have to use the eval command to pass however that is not compatible with Parfor so I am stuck.