3 files changed, 155 insertions, 0 deletions
diff --git a/README.md b/README.md
index 1e840d3..8aa9357 100644
--- a/README.md
+++ b/README.md
@@ -126,6 +126,15 @@ This writes `analysis/result_audit.md`, `analysis/result_cells.csv`,
 `analysis/paired_deltas.csv`, `analysis/delta_summary.csv`, and
 `analysis/coverage.csv`.
 
+Render a delta table PNG:
+
+```bash
+python3 scripts/render_delta_table.py \
+  --compute-label fixed-rrog-T1-ns3+trace \
+  --datasets zinc-cycle56 \
+  --out analysis/zinc_delta_table.png
+```
+
 ## Backbones
 
 The implemented 2D view/backbone list is shared across ZINC and OGB:
diff --git a/analysis/zinc_delta_table.png b/analysis/zinc_delta_table.png
new file mode 100644
index 0000000..9c3b9c4
--- /dev/null
+++ b/analysis/zinc_delta_table.png
diff --git a/scripts/render_delta_table.py b/scripts/render_delta_table.py
new file mode 100755
index 0000000..f1177a6
--- /dev/null
+++ b/scripts/render_delta_table.py
@@ -0,0 +1,146 @@
+#!/usr/bin/env python3
+from __future__ import annotations
+
+import argparse
+import csv
+import math
+from collections import defaultdict
+from pathlib import Path
+
+import matplotlib.pyplot as plt
+
+
+DEFAULT_BACKBONES = [
+    "gin",
+    "gine",
+    "gcn",
+    "graphsage",
+    "gatv2",
+    "graphconv",
+    "transformer",
+    "pna",
+    "gen",
+    "film",
+    "resgated",
+    "tag",
+    "sgc",
+    "cheb",
+    "arma",
+    "mf",
+    "appnp",
+]
+
+
+def mean(xs: list[float]) -> float:
+    return sum(xs) / len(xs) if xs else math.nan
+
+
+def parse_list(value: str) -> list[str]:
+    return [x.strip() for x in value.replace(",", " ").split() if x.strip()]
+
+
+def load_cells(path: Path, compute_label: str, datasets: list[str]) -> dict[tuple[str, str], float]:
+    requested = {x.lower() for x in datasets}
+    values: dict[tuple[str, str], list[float]] = defaultdict(list)
+    with path.open() as f:
+        for row in csv.DictReader(f):
+            dataset = row["dataset"].lower()
+            if requested and dataset not in requested:
+                continue
+            if row["compute_label"] != compute_label:
+                continue
+            values[(dataset, row["view"])].append(float(row["test_delta"]))
+    return {key: mean(xs) for key, xs in values.items()}
+
+
+def render_table(
+    cells: dict[tuple[str, str], float],
+    datasets: list[str],
+    backbones: list[str],
+    title: str,
+    out_path: Path,
+    digits: int,
+) -> None:
+    n_rows = max(1, len(datasets))
+    n_cols = max(1, len(backbones))
+    fig_w = max(12.0, 1.05 * n_cols + 2.8)
+    fig_h = max(2.4, 0.72 * n_rows + 1.8)
+    fig, ax = plt.subplots(figsize=(fig_w, fig_h), dpi=220)
+    ax.axis("off")
+
+    data = []
+    for dataset in datasets:
+        row = []
+        for backbone in backbones:
+            value = cells.get((dataset.lower(), backbone))
+            row.append("" if value is None or math.isnan(value) else f"{value:+.{digits}f}")
+        data.append(row)
+
+    table = ax.table(
+        cellText=data,
+        rowLabels=datasets,
+        colLabels=backbones,
+        cellLoc="center",
+        rowLoc="center",
+        loc="center",
+    )
+    table.auto_set_font_size(False)
+    table.set_fontsize(8.5)
+    table.scale(1.0, 1.65)
+
+    header_bg = "#f1f5f9"
+    edge = "#cbd5e1"
+    positive = "#15803d"
+    negative = "#b91c1c"
+    missing = "#64748b"
+    for (row_idx, col_idx), cell in table.get_celld().items():
+        cell.set_edgecolor(edge)
+        cell.set_linewidth(0.7)
+        text = cell.get_text()
+        if row_idx == 0 or col_idx == -1:
+            cell.set_facecolor(header_bg)
+            text.set_fontweight("bold")
+            text.set_color("#0f172a")
+            continue
+        raw = text.get_text()
+        if not raw:
+            text.set_text("-")
+            text.set_color(missing)
+            continue
+        value = float(raw)
+        if value > 0:
+            text.set_color(positive)
+            text.set_fontweight("bold")
+        elif value < 0:
+            text.set_color(negative)
+        else:
+            text.set_color("#334155")
+
+    ax.set_title(title, fontsize=13, fontweight="bold", pad=14)
+    fig.tight_layout(pad=0.8)
+    out_path.parent.mkdir(parents=True, exist_ok=True)
+    fig.savefig(out_path, bbox_inches="tight", facecolor="white")
+    plt.close(fig)
+
+
+def main() -> None:
+    ap = argparse.ArgumentParser()
+    ap.add_argument("--deltas", default="analysis/paired_deltas.csv")
+    ap.add_argument("--compute-label", default="fixed-rrog-T1-ns3+trace")
+    ap.add_argument("--datasets", default="zinc-cycle56")
+    ap.add_argument("--backbones", default=" ".join(DEFAULT_BACKBONES))
+    ap.add_argument("--out", default="analysis/zinc_delta_table.png")
+    ap.add_argument("--title", default="")
+    ap.add_argument("--digits", type=int, default=3)
+    args = ap.parse_args()
+
+    datasets = parse_list(args.datasets)
+    backbones = parse_list(args.backbones)
+    cells = load_cells(Path(args.deltas), args.compute_label, datasets)
+    title = args.title or f"Test Delta vs Classic: {args.compute_label}"
+    render_table(cells, datasets, backbones, title, Path(args.out), args.digits)
+    print(f"wrote {args.out}")
+
+
+if __name__ == "__main__":
+    main()