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. 2018 Oct 15;19(10):3172. doi: 10.3390/ijms19103172

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© 2018 by the authors.

Licensee MDPI, Basel, Switzerland. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) license (http://creativecommons.org/licenses/by/4.0/).

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Plots from ‘plotSexEstimation’. This function plots the first component of PCA.X (X.PC1) against the first component of PCA.Y (Y.PC1). The vast majority of test samples were predicted as either M (2253) or F (1618), but the sex was undetermined for 20 samples, indicated as N. (A) The ‘include_reference’ parameter was set to FALSE to show only test samples. (B) The ‘include_reference’ parameter option was set to TRUE to show reference samples, but they were mostly hidden underneath test samples.