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Why calculated elapsed time of function 'ar' is different with function 'tic toc' and 'timeit'?

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GeunHwan Kim
GeunHwan Kim on 8 Mar 2019
Commented: GeunHwan Kim on 10 Mar 2019
I want to compare computation complexity of Yule-Walker Method and other algorithm.
At firtst, I write the 2 codes below,
1) Calculate elapsed time using 'tic toc' function
tic;
ar(Test_Signal,N,'yw');
toc;
2) Calculate elapsed time using 'timeit' function
ff = @() ar(Test_Signal,N,'yw');
timeit(ff)
and results shows huge difference
1) 0.754736s
2) 0.0060s
Which result is correct? and how can I use this results with metric of computational complexity of algorithm?
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