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examples/plot_smooth_quantile.py

Lines changed: 34 additions & 35 deletions
Original file line numberDiff line numberDiff line change
@@ -16,44 +16,43 @@ def pinball_loss(residuals, quantile):
1616
return np.mean(residuals * (quantile - (residuals < 0)))
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1818

19-
if __name__ == "__main__":
20-
X, y = make_regression(n_samples=10000, n_features=1000, noise=0.1, random_state=0)
21-
tau = 0.8
22-
X_c = X - X.mean(axis=0)
23-
q_tau = np.quantile(y, tau)
24-
y_c = y - q_tau
19+
X, y = make_regression(n_samples=10000, n_features=1000, noise=0.1, random_state=0)
20+
tau = 0.8
21+
X_c = X - X.mean(axis=0)
22+
q_tau = np.quantile(y, tau)
23+
y_c = y - q_tau
2524

26-
start = time.time()
27-
sk = QuantileRegressor(quantile=tau, alpha=0.1, fit_intercept=False)
28-
sk.fit(X_c, y_c)
29-
sk_pred = sk.predict(X_c) + q_tau
30-
sk_time = time.time() - start
31-
sk_cov = np.mean(y <= sk_pred)
32-
sk_pinball = pinball_loss(y - sk_pred, tau)
25+
start = time.time()
26+
sk = QuantileRegressor(quantile=tau, alpha=0.1, fit_intercept=False)
27+
sk.fit(X_c, y_c)
28+
sk_pred = sk.predict(X_c) + q_tau
29+
sk_time = time.time() - start
30+
sk_cov = np.mean(y <= sk_pred)
31+
sk_pinball = pinball_loss(y - sk_pred, tau)
3332

34-
start = time.time()
35-
qh = SmoothQuantileRegressor(
36-
quantile=tau,
37-
alpha=0.1,
38-
delta_init=0.5,
39-
delta_final=0.01,
40-
n_deltas=5,
41-
solver="AndersonCD",
42-
verbose=True
43-
)
44-
qh.fit(X_c, y_c)
45-
qh_time = time.time() - start
46-
qh_pred = qh.predict(X_c) + q_tau
47-
qh_cov = np.mean(y <= qh_pred)
48-
qh_pinball = pinball_loss(y - qh_pred, tau)
33+
start = time.time()
34+
qh = SmoothQuantileRegressor(
35+
quantile=tau,
36+
alpha=0.1,
37+
delta_init=0.5,
38+
delta_final=0.01,
39+
n_deltas=5,
40+
solver="AndersonCD",
41+
verbose=True
42+
)
43+
qh.fit(X_c, y_c)
44+
qh_time = time.time() - start
45+
qh_pred = qh.predict(X_c) + q_tau
46+
qh_cov = np.mean(y <= qh_pred)
47+
qh_pinball = pinball_loss(y - qh_pred, tau)
4948

50-
print(f"{'Method':<12} {'Q':<4} {'Coverage':<8} {'Time':<6} "
51-
f"{'Pinball':<8}")
52-
print("-" * 55)
53-
print(f"{'Sklearn':<12} {tau:<4} {sk_cov:<8.3f} {sk_time:<6.3f} "
54-
f"{sk_pinball:<8.4f}")
55-
print(f"{'QuantileHuber':<12} {tau:<4} {qh_cov:<8.3f} {qh_time:<6.3f} "
56-
f"{qh_pinball:<8.4f}")
49+
print(f"{'Method':<12} {'Q':<4} {'Coverage':<8} {'Time':<6} "
50+
f"{'Pinball':<8}")
51+
print("-" * 55)
52+
print(f"{'Sklearn':<12} {tau:<4} {sk_cov:<8.3f} {sk_time:<6.3f} "
53+
f"{sk_pinball:<8.4f}")
54+
print(f"{'QuantileHuber':<12} {tau:<4} {qh_cov:<8.3f} {qh_time:<6.3f} "
55+
f"{qh_pinball:<8.4f}")
5756

5857

5958
quantiles = [0.1, 0.5, 0.9]

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