Summation with increasing index

Question

CBde 2017-1-14

0
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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/320408-summation-with-increasing-index

回答： Wilson A N 2017-1-17

Hello,

what I'm trying to do is probably quite simple, but I havn't gotten it up till now. I have a large quantity of data in the form of u1=2, u2=5, etc... and I want to basically get the average value of certain amount of u's, but I don't know how to specifyn these certain amounts in Matlab, because it only works with the form u(1) and not u1 when I try to make a loop with the index increasing.

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Answer 1

Wilson A N 2017-1-17

0
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此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/320408-summation-with-increasing-index#answer_250873

在 MATLAB Online 中打开

You can do variables in the form of u1, u2, etc as shown below:

for i = 1:10
  var{i} = ['u', num2str(i)]; 
end

If you try to access var{i} then you get a string. Now you can access the corresponding variable referred to by var{i} by using the 'eval' function. Please check the link given below for the eval function below:

https://www.mathworks.com/help/matlab/ref/eval.html