折線圖
#範例2-3：繪出藍色虛線(x,y)圖
#1101ad009 許瑋茹 2022/9/18
import matplotlib.pyplot as plt
listx = [1,5,2,4,10]
listy = [10,13,15,16,18]
plt.plot(listx,listy,color='blue',linestyle='-')
#plt.plot(listx,listy,'r--')
https://colab.research.google.com/drive/1dVc9BbwEXMlHZ_KI_IVN4sxvQGy2RaCN?usp=sharing
#範例4-12：自行建立DataFrame資料集，然後用express印出四位學生的三科成績
#1101ad009 許瑋茹 10/23
import pandas as pd
import plotly.express as px
#數據資料表，採用三個串列List(coulumn=course,record_name=name, record_data = score)
df = pd.DataFrame({
'姓名':['john','mary','peter','jolin'],
'國文':[75,90,65,95],
'英文':[85,90,55,65],
'數學':[95,90,60,90]
})
#用plotly.express畫圖
fig = px.line(title='全班同學的國文英文數學分數')
fig.add_scatter(x=df["姓名"], y=df["國文"],name='國文',showlegend=True)
fig.add_scatter(x=df["姓名"], y=df["英文"],name='英文',showlegend=True)
fig.add_scatter(x=df["姓名"], y=df["數學"],name='數學',showlegend=True)
#fig.show()
fig.write_html('exp4-12.html',auto_open=True)
fig.show()
柱狀圖
#範例3-7：統計同一州的人數柱狀圖顯示（state vs name)Bar plot with group by
#1101ad009 許瑋茹 2022/9/18
#指令：df.groupby('state')['name'].nunique().plot(kind='bar')
import pandas as pd
df = pd.DataFrame({
'name':['john','mary','peter','jeff','bill','may','jose'],
'age':[23,78,22,19,45,33,40],
'gender':['M','F','M','M','M','F','M'],
'state':['california','dc','california','dc','california','texas','texas'],
'num_children':[2,0,0,3,2,1,4],
'num_pets':[5,1,0,5,2,2,3]
})
df.groupby('gender')['name'].nunique().plot(kind='bar')
