How to find a the point where the loop is broken?

Question

Kalpha.mc 2020-11-1

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/632659-how-to-find-a-the-point-where-the-loop-is-broken

回答： Walter Roberson 2020-11-1

采纳的回答： Walter Roberson

在 MATLAB Online 中打开

I need to find where the diffence starts to be less then 0.01 which should me n = 12

But i can't seem to make it show up by itself?

terms = [2.0000  2.5216  2.6042  2.6379 
         2.2500  2.5465  2.6130  2.6424 
         2.3704  2.5658  2.6206  2.6464  
         2.4414  2.5812  2.6272  2.6500  
         2.4883  2.5937  2.6329  2.6533];  
 for index = 1 
     if terms >= 2
     n = abs(terms);
     t = diff(n);
     elseif t < 0.01
         n = find(t);
         disp(n)
             break
     
     end
 end
 

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Answer 1

Walter Roberson 2020-11-1

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https://ww2.mathworks.cn/matlabcentral/answers/632659-how-to-find-a-the-point-where-the-loop-is-broken#answer_530334

在 MATLAB Online 中打开

if terms >= 2

That is.

if all(terms >= 2)

which is important because some elements are true and some are false.

Note that you are within a for loop but you are not using the index of the loop there and the loop does not change the contents of the variable, so it is not possible to have different outcomes on different iterations of the loop. If, hypothetically, you were making the correct if test, then you would better off removing the loop. Perhaps you are making the wrong test.

You need to define whether you want to treat the entire matrix like a vector or if you want to give an answer for each row or each column.