Figure 2
Comparisons of the metal compositions of different groups of items within and between studies. Each plot represents all pairwise Pearson’s correlation coefficients between the log transformed metal compositions of groups of items. The median (central horizontal line), first and third quartiles (box ends), 1.5 × interquartile ranges (ends of whiskers) and remaining outliers (dots) are indicated. The comparisons in each panel is split into three as defined in the legend and the groups of items being compared are indicated by the labels above each plot. The y axis was truncated at 0.5.
