PTSDdiag 0.1.0

• Initial CRAN submission.
• Core analysis functions for identifying optimal 6-symptom PTSD diagnostic combinations using PCL-5 data.
• Hierarchical (cluster-based) and non-hierarchical analysis approaches.
• DSM-5 diagnostic criteria implementation (binarized and non-binarized).
• Diagnostic accuracy metrics: sensitivity, specificity, PPV, NPV.
• Holdout and k-fold cross-validation methods for model evaluation.
• Simulated PCL-5 dataset with 5,000 observations for demonstration.