绘制平均值和标准偏差 [英] Plot mean and standard deviation

问题描述

我在不同的x点上有几个函数值.我想在python中绘制均值和标准差，例如

I have several values of a function at different x points. I want to plot the mean and std in python, like the answer of this SO question. I know this must be easy using matplotlib, but I have no idea of the function's name that can do that. Does anyone know it?

推荐答案

可用于绘制x，y，错误数据(与通常的plt.plot相反)

plt.errorbar can be used to plot x, y, error data (as opposed to the usual plt.plot)

import matplotlib.pyplot as plt
import numpy as np

x = np.array([1, 2, 3, 4, 5])
y = np.power(x, 2) # Effectively y = x**2
e = np.array([1.5, 2.6, 3.7, 4.6, 5.5])

plt.errorbar(x, y, e, linestyle='None', marker='^')

plt.show()

plt.errorbar接受与plt.plot相同的参数，并带有附加的yerr和xerr，默认情况下为None(即，如果将其保留为空白，它将用作plt.plot).

plt.errorbar accepts the same arguments as plt.plot with additional yerr and xerr which default to None (i.e. if you leave them blank it will act as plt.plot).

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