Infodemiology and Infoveillance of Multiple Sclerosis in Italy
Figure 3
Exploratory spectral analysis, showing (a) MS time series and (b) the wavelet power spectrum (WPS) analysis. The contour levels are chosen so that 75%, 50%, 25%, and 5% of the wavelet power are above each level, respectively. (c) The global wavelet power spectrum (GWPS) analysis. These analysis were carried out using algorithms written in Matlab and accessible on http://paos.colorado.edu/research/wavelets/. Time unit is week; NSV stays for normalized search volume.
