New version of PLNoise: a package for exact numerical simulation of power-law noises

In a recent paper I have introduced a package for the exact simulation of power-law noises and other colored noises (E. Milotti, Comput. Phys. Commun. 175 (2006) 212): in particular the algorithm generates 1/f noises with 0 < α ≤ 2. Here I extend the algorithm to generate 1/f noises with 2 < α ≤ 4 (black noises). The method is exact in the sense that it produces a sampled process with a theoretically guaranteed range-limited power-law spectrum for any arbitrary sequence of sampling intervals, i.e., the sampling times may be unevenly spaced. PACS: 02.50.Ey,05.40.Ca,02.70.Uu