Day 4: Implement Step 1 of timestamp features + pandas syntax review

- Added make_timestamp_features.py (initial draft)
  • Implemented Step 1: load news2_scores.csv, convert charttime to datetime, sort by subject_id, stay_id, charttime
  • Ensures clean chronological dataset per patient before feature engineering

- Reviewed pandas syntax and project scripts
  • Annotated existing code (compute_news2.py, extract_news2_vitals.py, etc.) to understand DataFrame operations
  • Gained clarity on indexing, merging, pivoting, and reset_index(drop=True)

- Notes.md updated with Day 4 reflections
  • Focused on pandas learning curve, debugging strategies (print df.head()), and rationale for step order in pipeline
  • Recognised need to master a small set of pandas operations to move faster in later steps

Author: SimonYip22

.DS_Store

@@ -0,0 +1 @@
+subject_id,paco2_time,paco2,ph_time,ph