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pythonで3次元の散布図

Last updated at Posted at 2018-12-14
  • matplotlibで3次元の散布図を描きたいとき用のメモ書き
  • コピペして使おう
  • コード内のコメント見れば大体わかるはず。たぶん。

import numpy as np #適当な配列作るためにNumpy使う
X = np.array([i for i in range(1,1000)]) #自然数の配列
Y = np.sin(X) #特に意味のない正弦
Z = np.log(Y) #特に意味のない自然対数
#備考:Numpyだとnp.log()は自然対数。常用対数はnp.log10()

import matplotlib.pyplot as plt

#seabornでグラフをきれいにしたいだけのコード
import seaborn as sns
sns.set_style("darkgrid")

#3次元プロットするためのモジュール
from mpl_toolkits.mplot3d import Axes3D

#グラフの枠を作っていく
fig = plt.figure()
ax = Axes3D(fig)

#軸にラベルを付けたいときは書く
ax.set_xlabel("X")
ax.set_ylabel("Y")
ax.set_zlabel("Z")

#.plotで描画
#linestyle='None'にしないと初期値では線が引かれるが、3次元の散布図だと大抵ジャマになる
#markerは無難に丸
ax.plot(X,Y,Z,marker="o",linestyle='None')

#最後に.show()を書いてグラフ表示
plt.show()

3dscatter.png

参考
https://www.amazon.co.jp/dp/B07NQ5W8DW/ref=dp-kindle-redirect?_encoding=UTF8&btkr=1

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