Figure 3From: Spatio-temporal variations in the urban rhythm: the travelling waves of crimeThe circannual waves of crime are non-stationary at local level. In the plots, four selected regions of Chicago, IL. Though the circannual period is stationary at city-level, (A) the periodicity changes throughout the time series. To track the non-stationarity in the regions, we used (B) the scale-averaged wavelet power of the wavelet transform of \(Y^{c}_{i}\)Back to article page