rrBLUP_ML0_calc_ZtZplI

pybrops.model.gmod.rrBLUPModel0.rrBLUP_ML0_calc_ZtZplI(Z, ridge)

Calculate (Z’Z + lambda * I).

Parameters:

• Z (numpy.ndarray) – A genotype matrix of shape (nobs,nmkr).

• ridge (Real) – The ridge parameter, lambda. Must be non-negative.

Returns:

out – The calculated matrix of shape (nmkr,nmkr).

Return type:

numpy.ndarray