Mtplotlib-菜鳥教程-圖表例題1

折線圖

import pandas as pd
import matplotlib.pyplot as plt
iris = pd.read_csv(‘iris.csv’)
fig = plt.figure(figsize = (10, 10))
plt.plot(iris[‘sepal_width’],‘r–’,label=‘sepal_width’)
plt.legend(loc=‘best’)

散點圖

import pandas as pd
import matplotlib.pyplot as plt
iris = pd.read_csv(‘iris.csv’)
fig = plt.figure(figsize = (10, 10))
plt.scatter(iris[‘sepal_length’],iris[‘petal_length’],label=‘petal&sepal_length’)
plt.legend(loc=‘best’)//系統自動取最適合值
plt.xlabel(‘sepal_length’)//設置x軸
plt.ylabel(‘petal_length’)

直方圖

import pandas as pd
import matplotlib.pyplot as plt
iris = pd.read_csv(‘iris.csv’)
fig = plt.figure(figsize = (10, 10))
plt.hist(iris[‘petal_width’],label=‘petal_width’)
plt.legend(loc=‘best’)

箱線圖

import pandas as pd
import matplotlib.pyplot as plt
iris = pd.read_csv(‘iris.csv’)
fig= plt.figure(figsize = (10, 10))
plt.boxplot(iris[‘petal_length’]) plt.title(‘box plot’) //設置標題 plt.ylabel(‘data content’) //設置座標軸名稱