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. 2013 May 20;4:9. doi: 10.1186/2041-2223-4-9

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Copyright © 2013 Lao et al.; licensee BioMed Central Ltd.

This is an Open Access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/2.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Spatial autocorrelogram of the Dutch samples. Spatial autocorrelogram using the pairwise covariance matrix between the 969 Dutch individuals (after data cleaning). The matrix was estimated from a modified identical-by-state (IBS) distance matrix between pairs of individuals (see Methods for details) using the subset of linkage disequilibrium (LD) pruned genome-wide single nucleotide polymorphism (SNP) markers. Geodesic distance (in km) class between individuals is plotted on the X-axis. Level of autocorrelation for each distance class is depicted on the Y-axis.