moved_repo_first_update
This commit is contained in:
rpotter6298
@@ -0,0 +1,286 @@
|
||||
#!/usr/bin/env python3
|
||||
"""Aggregate per-fold metrics across runs and visualize AUC vs accuracy.
|
||||
|
||||
The script scans every `summary.json` under the provided analysis directory,
|
||||
loads the per-fold macro AUC values, and combines them with per-fold
|
||||
predictions to compute accuracy. Two scatter plots are produced:
|
||||
|
||||
1. AUC vs. fold index (with jitter) coloured by fold.
|
||||
2. Accuracy (x-axis) vs. AUC (y-axis) coloured by fold.
|
||||
|
||||
This helps identify folds that persistently underperform across experiments.
|
||||
"""
|
||||
from __future__ import annotations
|
||||
|
||||
import argparse
|
||||
import json
|
||||
import sys
|
||||
from dataclasses import dataclass
|
||||
from pathlib import Path
|
||||
from typing import Dict, Iterable, List, Optional
|
||||
|
||||
import numpy as np
|
||||
|
||||
try:
|
||||
import matplotlib.pyplot as plt
|
||||
from matplotlib.cm import get_cmap
|
||||
from matplotlib.lines import Line2D
|
||||
except ImportError as exc: # pragma: no cover - forward-friendly error for runtime
|
||||
raise SystemExit("matplotlib is required to run this script") from exc
|
||||
|
||||
|
||||
@dataclass
|
||||
class FoldMetric:
|
||||
run_id: str
|
||||
fold: int
|
||||
auc: float
|
||||
accuracy: float
|
||||
summary_path: Path
|
||||
fusion_mode: Optional[str]
|
||||
plot_head: str
|
||||
|
||||
|
||||
HEAD_SUFFIX = {
|
||||
"fused": "fused",
|
||||
"metadata": "md",
|
||||
"metadata_only": "md",
|
||||
"image": "img",
|
||||
"image_only": "img",
|
||||
"img": "img",
|
||||
"md": "md",
|
||||
}
|
||||
|
||||
|
||||
def infer_head(summary: Dict[str, object]) -> str:
|
||||
"""Return the prediction head name used for evaluation."""
|
||||
plot_head = summary.get("plot_head")
|
||||
if isinstance(plot_head, str) and plot_head:
|
||||
key = plot_head.lower()
|
||||
if key in HEAD_SUFFIX:
|
||||
return key
|
||||
fusion_mode = summary.get("fusion_mode")
|
||||
if isinstance(fusion_mode, str):
|
||||
key = fusion_mode.lower()
|
||||
if key in HEAD_SUFFIX:
|
||||
return key
|
||||
# Fall back to fused head if nothing else matches
|
||||
return "fused"
|
||||
|
||||
|
||||
def prediction_suffix(head: str) -> str:
|
||||
key = head.lower()
|
||||
if key in {"metadata", "metadata_only", "md"}:
|
||||
return "md"
|
||||
if key in {"image", "image_only", "img"}:
|
||||
return "img"
|
||||
return "fused"
|
||||
|
||||
|
||||
def compute_accuracy(probs: np.ndarray, y_true: np.ndarray) -> float:
|
||||
if probs.ndim == 1:
|
||||
preds = (probs >= 0.5).astype(int)
|
||||
else:
|
||||
preds = np.argmax(probs, axis=1)
|
||||
y_int = y_true.astype(int)
|
||||
return float((preds == y_int).mean()) if y_int.size else np.nan
|
||||
|
||||
|
||||
def load_summary(path: Path) -> Optional[Dict[str, object]]:
|
||||
try:
|
||||
with path.open("r") as f:
|
||||
return json.load(f)
|
||||
except Exception as exc:
|
||||
print(f"[warn] Could not parse {path}: {exc}", file=sys.stderr)
|
||||
return None
|
||||
|
||||
|
||||
def collect_metrics(summary_path: Path) -> Iterable[FoldMetric]:
|
||||
summary = load_summary(summary_path)
|
||||
if not summary:
|
||||
return []
|
||||
# Only keep multiclass experiments (num_classes > 2 or eval_mode explicitly multiclass)
|
||||
num_classes = summary.get("num_classes")
|
||||
eval_mode = summary.get("eval_mode")
|
||||
if (isinstance(num_classes, int) and num_classes <= 2) or (isinstance(eval_mode, str) and eval_mode.lower() == "binary"):
|
||||
return []
|
||||
|
||||
head = infer_head(summary)
|
||||
per_fold_auc = summary.get("per_fold_macro_ovr_auc") or summary.get("per_fold_auc")
|
||||
if not isinstance(per_fold_auc, list):
|
||||
# Fallback for summaries that only store fold_metrics[*].stats.
|
||||
metric_key = f"auc_{prediction_suffix(head)}"
|
||||
fold_metrics = summary.get("fold_metrics")
|
||||
if not isinstance(fold_metrics, list):
|
||||
return []
|
||||
per_fold_auc = []
|
||||
for entry in fold_metrics:
|
||||
if not isinstance(entry, dict):
|
||||
return []
|
||||
stats = entry.get("stats")
|
||||
if not isinstance(stats, dict):
|
||||
return []
|
||||
auc_val = stats.get(metric_key)
|
||||
try:
|
||||
per_fold_auc.append(float(auc_val))
|
||||
except (TypeError, ValueError):
|
||||
return []
|
||||
|
||||
suffix = prediction_suffix(head)
|
||||
run_id = summary.get("run_id", summary_path.parent.name)
|
||||
fusion_mode = summary.get("fusion_mode")
|
||||
|
||||
for fold_idx, auc_val in enumerate(per_fold_auc):
|
||||
try:
|
||||
auc = float(auc_val)
|
||||
except (TypeError, ValueError):
|
||||
continue
|
||||
|
||||
base = summary_path.parent
|
||||
probs_path = base / f"fold{fold_idx}_probs_{suffix}.npy"
|
||||
y_true_path = base / f"fold{fold_idx}_y_true.npy"
|
||||
if not probs_path.exists() or not y_true_path.exists():
|
||||
# fall back: if fused missing for metadata mode (or vice versa), try md or img
|
||||
if suffix != "fused":
|
||||
alt_probs_path = base / f"fold{fold_idx}_probs_fused.npy"
|
||||
if alt_probs_path.exists():
|
||||
probs_path = alt_probs_path
|
||||
if not probs_path.exists():
|
||||
print(
|
||||
f"[warn] Missing predictions for fold {fold_idx} in {base}; skipped",
|
||||
file=sys.stderr,
|
||||
)
|
||||
continue
|
||||
try:
|
||||
probs = np.load(probs_path)
|
||||
y_true = np.load(y_true_path)
|
||||
except Exception as exc:
|
||||
print(f"[warn] Failed loading predictions for {base}: {exc}", file=sys.stderr)
|
||||
continue
|
||||
accuracy = compute_accuracy(probs, y_true)
|
||||
yield FoldMetric(
|
||||
run_id=str(run_id),
|
||||
fold=fold_idx,
|
||||
auc=auc,
|
||||
accuracy=accuracy,
|
||||
summary_path=summary_path,
|
||||
fusion_mode=fusion_mode if isinstance(fusion_mode, str) else None,
|
||||
plot_head=head,
|
||||
)
|
||||
|
||||
|
||||
def build_plot(metrics: List[FoldMetric], output: Path, jitter: float, seed: int, show: bool) -> None:
|
||||
rng = np.random.default_rng(seed)
|
||||
folds = sorted({m.fold for m in metrics})
|
||||
fold_to_color: Dict[int, tuple] = {}
|
||||
cmap = get_cmap("tab10", max(len(folds), 1))
|
||||
for idx, fold in enumerate(folds):
|
||||
fold_to_color[fold] = cmap(idx)
|
||||
|
||||
# Prepare arrays for plotting
|
||||
aucs = np.array([m.auc for m in metrics])
|
||||
accs = np.array([m.accuracy for m in metrics])
|
||||
fold_indices = np.array([m.fold for m in metrics])
|
||||
colors = [fold_to_color[m.fold] for m in metrics]
|
||||
jitter_offsets = rng.uniform(-jitter, jitter, size=len(metrics))
|
||||
|
||||
fig, axes = plt.subplots(1, 2, figsize=(13, 5), constrained_layout=True)
|
||||
|
||||
# Panel 1: Fold vs AUC scatter with jitter
|
||||
ax0 = axes[0]
|
||||
ax0.scatter(fold_indices + 1 + jitter_offsets, aucs, c=colors, edgecolor="k", linewidth=0.4, alpha=0.85)
|
||||
ax0.set_xticks([f + 1 for f in folds])
|
||||
ax0.set_xlabel("Fold index")
|
||||
ax0.set_ylabel("Macro AUC")
|
||||
ax0.set_title("Per-fold AUC across runs")
|
||||
ax0.grid(True, linestyle=":", linewidth=0.5, alpha=0.4)
|
||||
|
||||
# Panel 2: Accuracy vs AUC scatter
|
||||
ax1 = axes[1]
|
||||
ax1.scatter(accs, aucs, c=colors, edgecolor="k", linewidth=0.4, alpha=0.85)
|
||||
ax1.set_xlabel("Accuracy")
|
||||
ax1.set_ylabel("Macro AUC")
|
||||
ax1.set_title("Accuracy vs AUC by fold")
|
||||
ax1.grid(True, linestyle=":", linewidth=0.5, alpha=0.4)
|
||||
|
||||
# Shared legend
|
||||
legend_handles = [
|
||||
Line2D(
|
||||
[0],
|
||||
[0],
|
||||
marker="o",
|
||||
color="w",
|
||||
label=f"Fold {fold + 1}",
|
||||
markerfacecolor=fold_to_color[fold],
|
||||
markeredgecolor="k",
|
||||
markersize=8,
|
||||
)
|
||||
for fold in folds
|
||||
]
|
||||
for ax in axes:
|
||||
ax.legend(handles=legend_handles, frameon=False, loc="lower right")
|
||||
|
||||
fig.suptitle("Fold-level performance across experiments", fontsize=14)
|
||||
|
||||
output.parent.mkdir(parents=True, exist_ok=True)
|
||||
fig.savefig(output, dpi=200)
|
||||
print(f"Saved plot to {output}")
|
||||
|
||||
if show:
|
||||
plt.show()
|
||||
plt.close(fig)
|
||||
|
||||
|
||||
def print_summary(metrics: List[FoldMetric]) -> None:
|
||||
total_runs = len({m.run_id for m in metrics})
|
||||
print(f"Collected {len(metrics)} fold metrics from {total_runs} runs.")
|
||||
by_fold: Dict[int, List[FoldMetric]] = {}
|
||||
for metric in metrics:
|
||||
by_fold.setdefault(metric.fold, []).append(metric)
|
||||
for fold, entries in sorted(by_fold.items()):
|
||||
aucs = np.array([m.auc for m in entries])
|
||||
accs = np.array([m.accuracy for m in entries])
|
||||
print(
|
||||
f" Fold {fold + 1}: AUC {aucs.mean():.3f} ± {aucs.std(ddof=0):.3f} | "
|
||||
f"Accuracy {accs.mean():.3f} ± {accs.std(ddof=0):.3f} (n={len(entries)})"
|
||||
)
|
||||
|
||||
|
||||
def main(argv: Optional[List[str]] = None) -> int:
|
||||
parser = argparse.ArgumentParser(description="Plot per-fold AUCs and accuracies across runs.")
|
||||
parser.add_argument(
|
||||
"--analysis-root",
|
||||
default="analysis_data",
|
||||
help="Root directory that contains run folders with summary.json files (default: analysis_data)",
|
||||
)
|
||||
parser.add_argument(
|
||||
"--output",
|
||||
default="analysis_data/fold_auc_vs_accuracy.png",
|
||||
help="Where to save the generated figure (default: analysis_data/fold_auc_vs_accuracy.png)",
|
||||
)
|
||||
parser.add_argument("--jitter", type=float, default=0.08, help="Horizontal jitter for fold scatter plot")
|
||||
parser.add_argument("--seed", type=int, default=17, help="Random seed for jitter replication")
|
||||
parser.add_argument("--show", action="store_true", help="Display the plot interactively after saving")
|
||||
args = parser.parse_args(argv)
|
||||
|
||||
analysis_root = Path(args.analysis_root)
|
||||
if not analysis_root.exists():
|
||||
raise SystemExit(f"Analysis root {analysis_root} does not exist")
|
||||
|
||||
summary_files = sorted(analysis_root.rglob("summary.json"))
|
||||
if not summary_files:
|
||||
raise SystemExit(f"No summary.json files found under {analysis_root}")
|
||||
|
||||
metrics: List[FoldMetric] = []
|
||||
for summary_path in summary_files:
|
||||
metrics.extend(collect_metrics(summary_path))
|
||||
|
||||
if not metrics:
|
||||
raise SystemExit("No fold metrics collected. Check that prediction files are present.")
|
||||
|
||||
print_summary(metrics)
|
||||
build_plot(metrics, Path(args.output), jitter=args.jitter, seed=args.seed, show=args.show)
|
||||
return 0
|
||||
|
||||
|
||||
if __name__ == "__main__":
|
||||
raise SystemExit(main())
|
||||
Reference in New Issue
Block a user