Οπτικοποίησε τις αλλαγές κατάταξης με διάγραμμα bump

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import numpy as np
import matplotlib.pyplot as plt

quarters = ["Q1", "Q2", "Q3", "Q4"]
brands = ["Alpha", "Bravo", "Charlie", "Delta", "Echo"]
ranks = np.array(
    [
        [1, 2, 3, 3],
        [3, 1, 1, 2],
        [2, 3, 2, 1],
        [4, 4, 5, 4],
        [5, 5, 4, 5],
    ]
)

fig, ax = plt.subplots(figsize=(7, 4))

for brand, rank in zip(brands, ranks):
    ax.plot(quarters, rank, marker="o", linewidth=2, label=brand)

ax.set_ylim(5.5, 0.5)
ax.set_ylabel("Κατάταξη")
ax.set_title("Κατάταξη πωλήσεων ανά brand")
ax.grid(axis="y", alpha=0.2)
ax.legend(loc="upper right", bbox_to_anchor=(1.15, 1))

fig.tight_layout()

plt.show()