Compute isometric log ratio coordinates.
HWIlr computes isometric log ratio coordinates for genotypic
compositions (AA, AB, BB)
HWIlr(X, zeroadj = 0.5)
X |
A matrix of genotype counts, markers in rows, counts for AA, AB and BB in three columns |
zeroadj |
Adjustment for zeros (0.5 by defaults) |
A matrix of log ratio coordinates.
Jan Graffelman (jan.graffelman@upc.edu)
Egozcue, J.J., Pawlowsky-Glahn, V., Mateu-Figueras, G. and Barcelo-Vidal, C. (2003) Isometric Logratio Transformations for Compositional Data Analysis. Mathematical Geology 35(3), pp. 279-300.
Graffelman, J. and Egozcue, J. J. (2011) Hardy-Weinberg equilibrium: a non-parametric compositional approach. In: Vera Pawlowsky-Glahn and Antonella Buccianti (eds.) Compositional Data Analysis: Theory and Applications, John Wiley \& Sons, Ltd, pp. 207-215
X <- HWData(100,100) Y <- HWIlr(X)
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