force_posdef

<p>logical, default TRUE. Should the function print the corrected eigenvalues?</p>

verbose

<p>Function to force positive definiteness on a matrix.</p>

The qda() function from package 'MASS' is extended to calculate a weighted linear (LDA) and quadratic discriminant analysis (QDA) by changing the group variances and group means based on cell-wise uncertainties.
The uncertainties can be derived e.g. through relative errors for each individual measurement (cell), not only row-wise or column-wise uncertainties.
The method can be applied compositional data (e.g. portions of substances, concentrations) and non-compositional data.

Solveig Pospiech

force_posdef: Force positive definiteness

Description

Usage

Arguments

Value