Method to Order Populations

Use this option to select the method used order the columns of the matrix P (m x d, where m = number of genetic markers and d is the number of ancestral populations) and the rows of matrix Q (d x n, where n= number of samples) from the factorization of F=PQ.

 

Select This Method;	When you want to:
Average Admixture	Order the d ancestral populations by the decreasing variance explained (Cabreros and Storey, 20191).
Variance Eplained	Order the d ancestral populations by the average admixture across samples. The average admixture for ancestral population i (i=1,2,...,d) is simply the sum of qij over all subscript j divided by n, where qij (an element of matrix Q) is the admixture probability of population i for individual j (j= 1,2,...,n).

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Cabreros, I, and Storey, J.D. 2019. A Likelihood-Free Estimator of Population Structure Bridging Admixture Models and Principal Components Analysis. Genetics 213: 1009-1029.

To Specify the Method for Combining Studies:

Select the desired method by clicking within the appropriate radio button.