divsim-code / analyses /plot_fig_variance_overview.py
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divsim reproducibility bundle: simulator, sweeps, analyses (step_marks fix)
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"""
Variance overview (moved deeper; WORKING mock, house style).
(a) ABSOLUTE variance in agent engagement explained by persona vs model selection,
by regime -- total grows and the model-selection component scales.
(b) per-model attractiveness = mean incoming excess cross-model engagement H.
"""
import sys
from pathlib import Path
from collections import defaultdict
import json, sqlite3
import numpy as np
import matplotlib
matplotlib.use("Agg")
import matplotlib.pyplot as plt
sys.path.insert(0, str(Path(__file__).parent))
from housestyle import serif, mono, MODEL_COLOR
RUNS = Path("runs")
OUT = Path(__file__).parent / "fig_variance_overview.png"
SHORT = {"Qwen/Qwen3-32B":"Qwen","openai/gpt-oss-20b":"gpt-oss",
"mistralai/Magistral-Small-2509":"Mag","zai-org/GLM-4-32B-0414":"GLM-4",
"google/gemma-4-31B-it":"Gemma"}
# ---- Panel A: PROPORTIONAL variance of comments-per-post (CPP) explained by
# own base model vs persona, by regime (in-sample R^2, %). Model overtakes persona.
absvar = {
"Two-way": {"persona": 8.5, "model": 9.9},
"Three-way": {"persona": 7.3, "model": 13.3},
"Four-way": {"persona": 5.8, "model": 25.4},
}
# ---- Panel B: per-model attractiveness from run DBs ----
def attractiveness():
inc = defaultdict(list)
for db in sorted(RUNS.glob("sweep_*.db")):
if any(x in db.name for x in ["archive","olm","hermes","glm47","pilot_","snapshot","qwq"]): continue
mp = str(db).replace(".db",".metadata.json")
if not Path(mp).exists(): continue
try: amm = json.load(open(mp)).get("agent_model_map",{})
except: continue
if not amm: continue
fam = {int(k)+1: SHORT.get(v["model"]) for k,v in amm.items()}
if any(v is None for v in fam.values()): continue
try:
c = sqlite3.connect(db)
posts = c.execute("SELECT post_id,user_id FROM post").fetchall()
coms = c.execute("SELECT post_id,user_id FROM comment").fetchall(); c.close()
except: continue
if len(coms) < 200: continue
owner = {p:u for p,u in posts}; F = sorted(set(fam.values()))
nf = {f: sum(1 for v in fam.values() if v==f) for f in F}; ntot = sum(nf.values())
edges = [(fam[cu],fam[owner[p]]) for p,cu in coms if owner.get(p) and owner[p]!=cu and cu in fam and owner[p] in fam]
tot = len(edges) or 1
obs = defaultdict(int)
for x,y in edges: obs[(x,y)] += 1
for Y in F:
hs=[obs.get((X,Y),0)/tot/((nf[X]/ntot)*((nf[Y])/(ntot-1)))-1 for X in F if X!=Y and nf[X]]
if hs: inc[Y].append(np.mean(hs))
return {m:(np.mean(v), np.std(v)/np.sqrt(len(v))) for m,v in inc.items()}
def temporal_incoming_H(n_bins=4):
"""Per-model incoming H over simulation quartiles (comment-order bins), pooled over runs."""
acc = defaultdict(lambda: defaultdict(list)) # model -> bin -> [H per run]
for db in sorted(RUNS.glob("sweep_*.db")):
if any(x in db.name for x in ["archive","olm","hermes","glm47","pilot_","snapshot","qwq"]): continue
mp = str(db).replace(".db",".metadata.json")
if not Path(mp).exists(): continue
try: amm = json.load(open(mp)).get("agent_model_map",{})
except: continue
if not amm: continue
fam = {int(k)+1: SHORT.get(v["model"]) for k,v in amm.items()}
if any(v is None for v in fam.values()): continue
try:
c = sqlite3.connect(db)
posts = c.execute("SELECT post_id,user_id FROM post").fetchall()
coms = c.execute("SELECT post_id,user_id FROM comment ORDER BY comment_id").fetchall(); c.close()
except: continue
if len(coms) < 200: continue
owner = {p:u for p,u in posts}; F = sorted(set(fam.values()))
nf = {f: sum(1 for v in fam.values() if v==f) for f in F}; ntot = sum(nf.values())
edges = [(fam[cu],fam[owner[p]]) for p,cu in coms
if owner.get(p) and owner[p]!=cu and cu in fam and owner[p] in fam]
if len(edges) < n_bins*20: continue
for b in range(n_bins):
seg = edges[b*len(edges)//n_bins:(b+1)*len(edges)//n_bins]
tot = len(seg) or 1
obs = defaultdict(int)
for xx,yy in seg: obs[(xx,yy)] += 1
for Y in F:
hs=[obs.get((X,Y),0)/tot/((nf[X]/ntot)*((nf[Y])/(ntot-1)))-1 for X in F if X!=Y and nf[X]]
if hs: acc[Y][b].append(np.mean(hs))
return acc
plt.rcParams.update({"axes.spines.top":False,"axes.spines.right":False,"figure.dpi":300})
fig,(axA,axB) = plt.subplots(1,2, figsize=(7.2,2.6), gridspec_kw={"width_ratios":[1,1.05]})
# Panel A: absolute grouped bars
regimes=["Two-way","Three-way","Four-way"]; x=np.arange(3); w=0.38
pc="#c0392b"; mc="#2c6fbb"
for i,key in enumerate(["persona","model"]):
vals=[absvar[r][key] for r in regimes]; off=(-w/2 if i==0 else w/2)
axA.bar(x+off, vals, w, color=(pc if i==0 else mc),
label=("persona" if i==0 else "base model"), edgecolor="white", lw=0.5)
for xi,vv in zip(x+off,vals):
axA.text(xi, vv+0.4, f"{vv:.1f}", ha="center", va="bottom", fontproperties=mono(8))
axA.set_xticks(x); axA.set_xticklabels(regimes, fontproperties=mono(9))
axA.set_ylabel("CPP variance explained ($R^2$, \\%)", fontproperties=mono(8.5))
axA.set_ylim(0, 29)
axA.legend(prop=mono(8), frameon=False, loc="upper left")
axA.set_title("(a) Per-post engagement: model overtakes persona", fontproperties=serif(9.5, bold=True))
axA.tick_params(labelsize=8)
# Panel B: per-model incoming H across mixture sizes (one line per base model), centered at y=0
TETDIR = RUNS / "tetratic"
def regime_H():
acc = defaultdict(lambda: defaultdict(list)) # model -> regime -> [H per run]
def proc(globpat, tet=False):
for db in sorted(globpat):
if not tet and any(x in db.name for x in ["archive","olm","hermes","glm47","pilot_","snapshot","qwq"]): continue
if tet and (TETDIR/f"{db.stem}_checkpoint.json").exists(): continue
mp = str(db).replace(".db",".metadata.json")
if not Path(mp).exists(): continue
try: amm = json.load(open(mp)).get("agent_model_map",{})
except: continue
if not amm: continue
fam = {int(k)+1: SHORT.get(v["model"]) for k,v in amm.items()}
if any(v is None for v in fam.values()): continue
try:
c = sqlite3.connect(db)
posts = c.execute("SELECT post_id,user_id FROM post").fetchall()
coms = c.execute("SELECT post_id,user_id FROM comment").fetchall(); c.close()
except: continue
if len(coms) < (100 if tet else 200): continue
F = sorted(set(fam.values())); reg = {2:"dyad",3:"triad",4:"tetrad"}.get(len(F))
if not reg: continue
owner = {p:u for p,u in posts}; nf = {f: sum(1 for v in fam.values() if v==f) for f in F}; N = sum(nf.values())
edges = [(fam[cu],fam[owner[p]]) for p,cu in coms if owner.get(p) and owner[p]!=cu and cu in fam and owner[p] in fam]
tot = len(edges) or 1; obs = defaultdict(int)
for a,b in edges: obs[(a,b)] += 1
for Y in F:
hs = [obs.get((X,Y),0)/tot/((nf[X]/N)*(nf[Y]/(N-1)))-1 for X in F if X!=Y]
if hs: acc[Y][reg].append(np.mean(hs))
proc(RUNS.glob("sweep_*.db")); proc(TETDIR.glob("tetra_s*_r*.db"), tet=True)
return acc
rH = regime_H()
regs = ["dyad","triad","tetrad"]; xr = np.arange(3)
axB.axhline(0, color="#666", lw=0.9, ls=":")
for m in ["gpt-oss","Qwen","GLM-4","Gemma","Mag"]:
if m not in rH: continue
ys = [np.mean(rH[m][r]) if rH[m].get(r) else np.nan for r in regs]
axB.plot(xr, ys, marker="o", ms=4.5, lw=1.8, color=MODEL_COLOR[m], label=m)
allv = [np.mean(rH[m][r]) for m in rH for r in regs if rH[m].get(r)]
M = max(abs(v) for v in allv) * 1.18
axB.set_ylim(-M, M)
axB.set_xticks(xr); axB.set_xticklabels(["dyad","triad","tetrad"], fontproperties=mono(9))
axB.set_xlim(-0.15, 2.15)
axB.set_ylabel("incoming $H$ (excess engagement)", fontproperties=mono(8.5))
axB.set_title("(b) Attraction sharpens with mixture size", fontproperties=serif(9.5, bold=True))
axB.legend(prop=mono(7), frameon=False, ncol=2, loc="lower left", handlelength=1.3)
axB.tick_params(labelsize=8)
plt.tight_layout(w_pad=1.5)
fig.savefig(OUT, dpi=300, bbox_inches="tight")
print(f"saved {OUT.name}")