Plot the periodograms of the random data line codes and to multiply fft output with sampling time to make it similar to the analog counterpart. task 1 and 2 are about quantization

nfftls is a program for fast computing Lomb-Scargle periodograms. The present archive contains an example of C implementation of the code described in B. Leroy, "Fast calculation of the Lomb-Scargle periodogram using nonequispaced fast Fourier t