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Figure 6 | Malaria Journal

Figure 6

From: Defining the relationship between Plasmodium falciparum parasite rate and clinical disease: statistical models for disease burden estimation

Figure 6

Spatial semivariograms of model residuals. Sample semivariograms of deviance residuals estimated at discrete lags (circles) and compared to a Monte Carlo null envelope (dashed lines) representing the range of values expected by chance in the absence of spatial autocorrelation. An estimated value falling outside the null envelope is indicative of significant spatial structure in the residuals at that lag. Shown are plots for the Africa+ region (left) and the combined Central and South East Asia and Americas regions (right).

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