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FactorEM weighted fits degrade sharply below ESS ≈ 100 (statistical cliff; restarts don't help)

Status: Open.

#20 In sisl/StructuredGaussianMixtures.jl;

· lea-m-hadzic opened on Jul 10, 2026

predict() throws DomainError from sqrt of numerically-negative eigenvalue (LRD conditional)

Status: Open.

#19 In sisl/StructuredGaussianMixtures.jl;

· lea-m-hadzic opened on Jul 10, 2026

Speed up PCAEM: PCA computes a full decomposition then truncates; use a partial eigensolver on the smaller Gram matrix

Status: Open.

#18 In sisl/StructuredGaussianMixtures.jl;

· jamgochiana opened on Jul 9, 2026

Improve FactorEM low-rank factor F initialization (currently 0.1*I)

Status: Open.

#17 In sisl/StructuredGaussianMixtures.jl;

· jamgochiana opened on Jul 9, 2026

Potential bug: predict conditional covariance may not match Schur complement (needs investigation)

Status: Open.

#16 In sisl/StructuredGaussianMixtures.jl;

· jamgochiana opened on Jul 9, 2026

Weighted fitting in log space for stability

Status: Open.

#15 In sisl/StructuredGaussianMixtures.jl;

· jamgochiana opened on Jul 8, 2026

Add MPPCA as a fitting strategy

Status: Open.

#6 In sisl/StructuredGaussianMixtures.jl;

· jamgochiana opened on Jul 22, 2025

Add better support for checking convergence

Status: Open.

#5 In sisl/StructuredGaussianMixtures.jl;

· jamgochiana opened on Jul 8, 2025