How to find the efficiency of an algorithm?

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Sadiq Akbar 2023-2-9

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https://ww2.mathworks.cn/matlabcentral/answers/1909310-how-to-find-the-efficiency-of-an-algorithm

编辑： Sadiq Akbar 2023-2-9

I have an algorithm fpa1. How can I find its efficiency? All the required files are in the attachment. You can run the main file to run the algorithm. But how to find its efficiency?

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Answer 1

Tushar Behera 2023-2-9

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Hi Sadiq,

I am assuming you want to know how efficient your code is.

You can utilise MATLAB's "profile" built-in function to gauge how effective your code is. The "profile" function creates a report that includes performance data and the amount of time spent in each function. The "tik" and "toc" functions can also be used to calculate how long it takes a chunk of code to run.

For example;

profile on
n = 100;
M = magic(n);
profile viewer
%%%%
tic;
n = 100;
M = magic(n);
toc;

You can read more abut it in the following link:

Profile execution time for functions - MATLAB profile (mathworks.com)

Regards,

Tushar

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Sadiq Akbar 2023-2-9

编辑：Sadiq Akbar 2023-2-9

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Thanks a lot dear Tushar Behera for your kind response. Yes, you are right. I have already included the tic and toc commands inside, but in my case the parametres change i.e., in 1st case:

u=[-25 50];

and run it, so it gives me execution time. Then I increase parametrs to 3 as below:

u=[-5 5 65];

and again run it, so it gives me different time. Again I change my parameters to 4 as below:

u=[-20 5 35 -35];

and I run it and this time it gives me different time. So, I am confused which time should I take for its efficiency?

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