import matplotlib.pyplot as plt plt.scatter([1,2,3,4],[2,3,2,5])plt.title('My first plot')plt.show() import numpy as npimport pandas as pdimport matplotlib.pyplot as pltfrom mpl_toolkits.mplot3d import Axes3D x = np.arange(-2*np.pi,2*np.pi,0.1)y = np…

Matplotlib绘图基础 1.Figure和Subplot import numpy as np import matplotlib.pyplot as plt #创建一个Figure fig = plt.figure() #不能通过空figure绘图,必须使用add_subplot创建一个或多个subplot #图像为2x2,第三个参数为当前选中的第几个 ax1 = fig.add_subplot(2, 2, 1) ax2 = fig.add_subplot(2, 2, 2) ax3 =…

在利用Python做数据分析时,探索数据以及结果展现上图表的应用是不可或缺的. 在Python中通常情况下都是用matplotlib模块进行图表制作. 先理下,matplotlib的结构原理: matplotlib API包含有三层: 1.backend_bases.FigureCanvas : 图表的绘制领域 2.backend_bases.Renderer : 知道如何在FigureCanvas上如何绘图 3.artist.Artist : 知道如何使用Renderer在FigureCanv…

测试环境: Jupyter QtConsole 4.2.1Python 3.6.1 1.  基本画线: 以下得出红蓝绿三色的点 import numpy as npimport matplotlib.pyplot as plt # evenly sampled time at 200ms intervalst = np.arange(0., 5., 0.2) # red dashes, blue squares and green trianglesplt.plot(t, t, 'r--', t…

import numpy as np import matplotlib.pyplot as plt from sklearn import datasets from sklearn.model_selection import train_test_split from sklearn.tree import DecisionTreeClassifier,DecisionTreeRegressor def load_data(): ''' 加载用于分类问题的数据集.数据集采用 scikit-…

import numpy as np import matplotlib.pyplot as plt from sklearn import datasets from sklearn.model_selection import train_test_split from sklearn.tree import DecisionTreeClassifier,DecisionTreeRegressor def creat_data(n): np.random.seed(0) X = 5 * np…

import numpy as np import matplotlib.pyplot as plt from matplotlib import cm from mpl_toolkits.mplot3d import Axes3D from sklearn.model_selection import train_test_split from sklearn import datasets, linear_model,discriminant_analysis def load_data()…

import numpy as np import matplotlib.pyplot as plt from matplotlib import cm from mpl_toolkits.mplot3d import Axes3D from sklearn import datasets, linear_model from sklearn.model_selection import train_test_split def load_data(): # 使用 scikit-learn 自带…

import numpy as np import matplotlib.pyplot as plt from matplotlib import cm from mpl_toolkits.mplot3d import Axes3D from sklearn import datasets, linear_model from sklearn.model_selection import train_test_split def load_data(): diabetes = datasets.…

import numpy as np import matplotlib.pyplot as plt from sklearn import datasets, linear_model from sklearn.model_selection import train_test_split def load_data(): diabetes = datasets.load_diabetes() return train_test_split(diabetes.data,diabetes.tar…