matplotlib中填充的误差线(矩形) [英] Filled errorbars in matplotlib (rectangles)

问题描述

是否可以在matplotlib中绘制这样的图?我只关心红色填充的矩形，使用errorbar即可轻松完成十字.

Is it possibile to make a plot like this in matplotlib? I care only about the red filled rectangles, the crosses are easily done with errorbar.

推荐答案

不幸的是，errorbar无法做到这一点，但是您可以根据自己的错误数据创建一个PatchCollection，并且可以轻松地将其添加到轴中.有关如何执行此操作的示例，请参见此快速脚本.

Unfortunately errorbar can't do this, but you can create a PatchCollection from your error data which can easily be added to the axes. See this quick script for an example of how you could do this.

import numpy as np
import matplotlib.pyplot as plt
from matplotlib.collections import PatchCollection
from matplotlib.patches import Rectangle

# Number of data points
n=5

# Dummy data
x=np.arange(0,n,1)
y=np.random.rand(n)*5.

# Dummy errors (above and below)
xerr=np.random.rand(2,n)
yerr=np.random.rand(2,n)

# Create figure and axes
fig,ax = plt.subplots(1)

# Plot data points
ax.errorbar(x,y,xerr=xerr,yerr=yerr,fmt='None',ecolor='k')

# Function to plot error boxes
def makeErrorBoxes(xdata,ydata,xerror,yerror,fc='r',ec='None',alpha=0.5):

    # Create list for all the error patches
    errorboxes = []

    # Loop over data points; create box from errors at each point
    for xc,yc,xe,ye in zip(xdata,ydata,xerror.T,yerror.T):
        rect = Rectangle((xc-xe[0],yc-ye[0]),xe.sum(),ye.sum())
        errorboxes.append(rect)

    # Create patch collection with specified colour/alpha
    pc = PatchCollection(errorboxes,facecolor=fc,alpha=alpha,edgecolor=ec)

    # Add collection to axes
    ax.add_collection(pc)

# Call function to create error boxes
makeErrorBoxes(x,y,xerr,yerr)

# Add some space around the data points on the axes
ax.margins(0.1)

plt.show()

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