AIMs and PCAIMs are able to predict sample ancestry with high accuracy for most populations, even at small numbers of markers. (a) Percent of samples correctly assigned using 25 markers, across all populations. AIMs are shown in green, PCAIMs in blue. (b) Assignment of Finnish samples, for varying numbers of markers. AIMs are shown as a solid line and PCAIMs as a dashed line. (c) Assignment of German samples, with increasing numbers of markers. (d) Assignment of Swedish samples, using 25 markers; AIMs are shown in green and PCAIMs in blue.