## locStra: Fast Implementation of (Local) Population Stratification Methods

Fast implementations to compute the genetic covariance matrix, the Jaccard similarity matrix, the s-matrix (the weighted Jaccard similarity matrix), and the (classic or robust) genomic relationship matrix of a (dense or sparse) input matrix (see Hahn, Lutz, Hecker, Prokopenko, Cho, Silverman, Weiss, and Lange (2020) <doi:10.1002/gepi.22356>). Full support for sparse matrices from the R-package 'Matrix'. Additionally, an implementation of the power method (von Mises iteration) to compute the largest eigenvector of a matrix is included, a function to perform an automated full run of global and local correlations in population stratification data, a function to compute sliding windows, and a function to invert minor alleles and to select those variants/loci exceeding a minimal cutoff value. New functionality in locStra allows one to extract the k leading eigenvectors of the genetic covariance matrix, Jaccard similarity matrix, s-matrix, and genomic relationship matrix via fast PCA without actually computing the similarity matrices. The fast PCA to compute the k leading eigenvectors can now also be run directly from 'bed'+'bim'+'fam' files.

Version: |
1.9 |

Imports: |
Rcpp (≥ 0.12.13), Rdpack, Matrix, RSpectra, bigsnpr |

LinkingTo: |
Rcpp, RcppEigen |

Published: |
2022-04-12 |

Author: |
Georg Hahn [aut,cre], Sharon M. Lutz [ctb], Christoph Lange [ctb] |

Maintainer: |
Georg Hahn <ghahn at hsph.harvard.edu> |

License: |
GPL-2 | GPL-3 [expanded from: GPL (≥ 2)] |

NeedsCompilation: |
yes |

CRAN checks: |
locStra results |

#### Documentation:

#### Downloads:

#### Linking:

Please use the canonical form
`https://CRAN.R-project.org/package=locStra`
to link to this page.