Comparații cantitative: diagrame cu bare

Introducere în vizualizarea datelor cu Matplotlib

Ariel Rokem

Data Scientist

Medalii olimpice

,Gold, Silver, Bronze
United States, 137, 52, 67
Germany, 47, 43, 67
Great Britain, 64, 55, 26
Russia, 50, 28, 35
China, 44, 30, 35
France, 20, 55, 21
Australia, 23, 34, 25
Italy, 8, 38, 24
Canada, 4, 4, 61
Japan, 17, 13, 34

Medalii olimpice: vizualizarea datelor

medals = pd.read_csv('medals_by_country_2016.csv', index_col=0)

fig, ax = plt.subplots()

ax.bar(medals.index, medals["Gold"])
plt.show()

Rotirea etichetelor axei

fig, ax = plt.subplots()
ax.bar(medals.index, medals["Gold"])

ax.set_xticklabels(medals.index, rotation=90)
ax.set_ylabel("Number of medals")

plt.show()

Medalii olimpice: vizualizarea celorlalte medalii

fig, ax = plt.subplots
ax.bar(medals.index, medals["Gold"])

ax.bar(medals.index, medals["Silver"], bottom=medals["Gold"])

ax.set_xticklabels(medals.index, rotation=90)
ax.set_ylabel("Number of medals")
plt.show()

Medalii olimpice: vizualizarea tuturor celor trei

fig, ax = plt.subplots
ax.bar(medals.index, medals["Gold"])

ax.bar(medals.index, medals["Silver"], bottom=medals["Gold"])

ax.bar(medals.index, medals["Bronze"],
       bottom=medals["Gold"] + medals["Silver"])

ax.set_xticklabels(medals.index, rotation=90)
ax.set_ylabel("Number of medals")
plt.show()

Diagramă cu bare stivuite

Adăugarea unei legende

fig, ax = plt.subplots
ax.bar(medals.index, medals["Gold"])
ax.bar(medals.index, medals["Silver"], bottom=medals["Gold"])
ax.bar(medals.index, medals["Bronze"],
       bottom=medals["Gold"] + medals["Silver"])

ax.set_xticklabels(medals.index, rotation=90)
ax.set_ylabel("Number of medals")

Adăugarea unei legende

fig, ax = plt.subplots
ax.bar(medals.index, medals["Gold"], label="Gold")
ax.bar(medals.index, medals["Silver"], bottom=medals["Gold"], 
       label="Silver")
ax.bar(medals.index, medals["Bronze"],
       bottom=medals["Gold"] + medals["Silver"], 
       label="Bronze")

ax.set_xticklabels(medals.index, rotation=90)
ax.set_ylabel("Number of medals")

ax.legend()
plt.show()

Diagramă cu bare stivuite și legendă

Creați o diagramă cu bare!

Introducere în vizualizarea datelor cu Matplotlib