[英]Add a normal distribution to seaborn 2D histogram
Is it possible to take a histogram from seaborn and add a normal distribution?是否可以从 seaborn 获取直方图并添加正态分布?
Say I had something like this scatter plot and histogram from the documentation.假设我有类似的散点图 plot 和文档中的直方图。
import seaborn as sns
penguins = sns.load_dataset("penguins")
sns.jointplot(data=penguins, x="bill_length_mm", y="bill_depth_mm");
plt.savefig('deletethis.png', bbox_inches='tight')
Can i superimpose a distribution on the sides like the image below?我可以像下图那样在侧面叠加分布吗?
import matplotlib.pyplot as plt
import numpy as np
from scipy.stats import norm
x = np.random.normal(size=100000)
# Plot histogram in one-dimension
plt.hist(x,bins=80,density=True)
xvals = np.arange(-4,4,0.01)
plt.plot(xvals, norm.pdf(xvals),label='$N(0,1)$')
plt.legend();
The following gives a Kernel Density Estimate which displays the distribution (and if it is normal):下面给出了一个 Kernel 密度估计,它显示了分布(如果它是正常的):
g = sns.JointGrid(data=penguins, x="bill_length_mm", y="bill_depth_mm")
g.plot_joint(sns.scatterplot, s=100, alpha=.5)
g.plot_marginals(sns.histplot, kde=True)
The following superimposes a normal distribution on the histograms in the axes.下面在轴上的直方图上叠加一个正态分布。
import seaborn as sns
import numpy as np
import pandas as pd
from scipy.stats import norm
df1 = penguins.loc[:,["bill_length_mm", "bill_depth_mm"]]
axs = sns.jointplot("bill_length_mm", "bill_depth_mm", data=df1)
axs.ax_joint.scatter("bill_length_mm", "bill_depth_mm", data=df1, c='r', marker='x')
axs.ax_marg_x.cla()
axs.ax_marg_y.cla()
sns.distplot(df1.bill_length_mm, ax=axs.ax_marg_x, fit=norm)
sns.distplot(df1.bill_depth_mm, ax=axs.ax_marg_y, vertical=True, fit=norm)
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