How would you automate this code?

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Armando MAROZZI 2021-2-9

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评论： Armando MAROZZI 2021-2-9

采纳的回答： Rik

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I have the following situation:

d = [3    39    54    53     6]; 
n = 103;

What I would like to do is to have a code where: when the sum of the elements in d is bigger than n, then I subtract one from the first column in d that is equal or bigger than n.

In the example above, I would have:

d = [3 39 54 *52* 6];
% since the first column where sum(d) is bigger than n is the fourth column, therefore I subtract 1 from 52

How can I automate this?

Thanks!

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Rik 2021-2-9

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https://ww2.mathworks.cn/matlabcentral/answers/740217-how-would-you-automate-this-code#answer_618682

Th cumsum and find functions should be useful. Let me know if you have trouble implementing it.

Loops are an excellent first step. Matlab is good at optimizing code that is easy to interpret. Loops are the best choice if there isn't a direct function available. Using cellfun (except for the legacy syntax) or arrayfun only hides the loop and tends to have worse performance.

Armando MAROZZI 2021-2-9