Figure 2From: Evidence for overdispersion in the distribution of malaria parasites and leukocytes in thick blood smearsSample autocorrelation function (ACF) . Autocorrelation plots for parasite (p a , p b , p c ) and leukocyte ( â„“ a , â„“ b , â„“ c ) counts show correlations between values x i and lagged values of the counts for lags from 0 to 30. The lagged values can be written as x i -1 ,x i -2 ,x i -3 , and so on. ACF gives correlations betweenx i and x i -1 ,x i and xi-2, and so on. The lag is shown along the x-axis, and the autocorrelation is on the y-axis. The blue dotted lines indicate bounds for statistical significance.Back to article page