Plot measured vs predicted SOH for multiple systems on one figure.
Each system gets a unique color. Measured SOH shown as markers,
predicted SOH as lines.
- Parameters:
systems_results (dict) – Dict keyed by system_id. Each value contains
simulation data with date and predicted_soh, truth
data with date and measured_soh, and optional metrics.
results_directory (str) – Directory to save plot
- Return type:
None