import numpy as np
import matplotlib.pyplot as plt

# ── Parameters ─────────────────────────────────────────────────────────────
seed      = 1101
size      = 30
colormap  = "inferno"
n_blobs   = 3

# ── Data ────────────────────────────────────────────────────────────────────
x = np.linspace(-3.0, 3.0, size)
y = np.linspace(-2.0, 4.0, size)
X, Y = np.meshgrid(x, y)
Z = np.zeros((size, size))

Z += 1.552988 * np.exp(
    -((X - -1.716141)**2 / (2 * 1.395595**2)
      + (Y - 2.259832)**2 / (2 * 0.976561**2))
)
Z += 1.494779 * np.exp(
    -((X - 1.433211)**2 / (2 * 1.003038**2)
      + (Y - 2.578709)**2 / (2 * 1.166745**2))
)
Z += -0.639885 * np.exp(
    -((X - 0.680747)**2 / (2 * 0.584805**2)
      + (Y - -0.833286)**2 / (2 * 0.614303**2))
)

# ── Plot ────────────────────────────────────────────────────────────────────
fig, ax = plt.subplots(figsize=(6, 5))
im = ax.pcolormesh(X, Y, Z, cmap=colormap, shading="auto")
fig.colorbar(im, ax=ax, label="Intensity")
ax.set_title(f"Gaussian Heatmap  ({n_blobs} blob(s))")
ax.set_xlabel("X")
ax.set_ylabel("Y")
fig.tight_layout()
plt.show()