Python 機器學習: 距離導向聚類法(k-Means 演算法), 如何繪製3D散佈圖? spyder無法用滑鼠改變3D圖的視角該如何處理? %matplotlib qt

k-Means 演算法:

k種聚類, k怎麼取?

https://pse.is/3x8g3y

測試資料:

import pandas as pd
import matplotlib.pyplot as plt

fpath = r”C:\Python\P107\doc\student_grades.csv”
df = pd.read_csv(fpath)
print(df)

lisChi = df[“chinese”].tolist()
lisEng = df[“english”].tolist()
lisMath= df[“math”].tolist()

fig = plt.figure()
ax = plt.axes( projection = “3d”)
#官網建議要放參數的話使用 plt.axes()
#或 plt.subplot(projection=”3d”)

ax.scatter(lisChi, lisEng, lisMath,
label = “students’ Grade distribution”,
color = “#ff00ff”, marker= “^”)

ax.set_xlabel(“Chinese”)
ax.set_ylabel(“English”)
ax.set_zlabel(“Math”)

for i in range(len(lisChi)):
    textLabel = “(%d,%d,%d)” \
    %(lisChi[i], lisEng[i], lisMath[i])
    ax.text(lisChi[i],lisEng[i],lisMath[i],
    s=textLabel)

ax.legend(loc=”best”)
plt.show()
“””
spyder內嵌的靜態圖片無法用滑鼠改變視角
console中輸入:
%matplotlib qt
再執行py檔,會生出可互動的獨立視窗
%matplotlib inline
切換回原本的內嵌模式
“””

print(df):

%matplotlib qt

可互動的3D散佈圖:

%matplotlib inline

內嵌無法互動的靜態3D散佈圖:

推薦hahow線上學習python: https://igrape.net/30afN