[Python] 그래프 그리기

import matplotlib.pyplot as plt

import numpy as np

import seaborn as sns

from matplotlib import font_manager

 

flights = sns.load_dataset("flights")

print(flights.head())

#연도별 평균

avg = flights.groupby('year')["passengers"].mean().reset_index()

# reset_index() : 인덱스를 초기화, 기존 인덱스를 데이터프레임의 열로 변환

# 1-1

plt.plot(avg["year"], avg["passengers"])

plt.grid(True)

plt.show()

# 1-2

pivot = flights.pivot(index="month", columns="year", values="passengers")

print(pivot)

sns.heatmap(pivot, annot=True, fmt="d")

plt.show()

# 1-3

y_1958 = flights[flights['year'] == 1958]

sns.barplot(x="month", y="passengers", data=y_1958)

plt.show()