Exploring the past and forecasting the future of malaria in selected Nigerian states: A time series modelling approach using wavelet and SARIMA
Fig 5
Left panel: Cross-wavelet power spectrum of malaria incidence between a. Nasarawa and Kwara c. Nasarawa and Zamfara, and e. Zamfara and Kwara.
Right panel: Phase difference between b. Nasarawa and Kwara d. Nasarawa and Zamfara, and f. Zamfara and Kwara. The black thick contours indicate 5% significance levels against red noise and the white line indicates the cone of influence that delimits the region not influenced by edge effects.