Extracts coefficients from an existing SuSiE-ASH fit or fits `susieR::susie()` with `unmappable_effects = "ash"`.
Arguments
- X
Genotype matrix. Required when `susieAshFit` is NULL.
- y
Phenotype vector. Required when `susieAshFit` is NULL.
- susieAshFit
Optional fitted SuSiE-ASH object.
- retainFit
If TRUE, stores the fitted object as an attribute on the returned weights.
- ...
Additional arguments passed to `susieR::susie()` when fitting.