Figure 4From: Internal migration and mobile communication patterns among pairs with strong tiesSpearman correlation coefficients for calling frequency quantities between different months. These plots show the Spearman correlation coefficients between the unstandardised number or fraction of calls in one month and another month for pairs with mover egos ((a) and (b)) and pairs with non-mover egos ((c) and (d)). Each line corresponds to a particular month, and shows the correlation coefficients between that month and all values of t. The correlation coefficient between the particular month and itself simply has a value of 1Back to article page