code vs written formula

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Ashis Pandey 2022-6-14

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https://ww2.mathworks.cn/matlabcentral/answers/1740530-code-vs-written-formula

编辑： Torsten 2022-6-14

I am trying to understand what calxculation the code is doing.. can you breakdown the formuola in the first line like how it looks when written in mathematical form?

Nfft = 2^(ceil(log2(size(freq,2)))+1);
Ts = 1/Nfft/(freq(2)-freq(1)+1e-16); %Avoid nan checks
time_vec = (0:Ts:Ts*(Nfft-1));
dist_vec = time_vec*1.5e8; %distance in meters

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Torsten 2022-6-14

编辑：Torsten 2022-6-14

Take the number of columns of the matrix "freq", take the log to the basis 2 of this number, take the nearest positive integer (>= this number), take (2^this number) and multiply the result by 2.

E.g. if freq has 64 columns, you get 64 = 2^6 -> 6 -> 6 -> 2^6 = 64 -> 2*64=128 = Nfft.

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