如何将文本放在三维条形图的顶部

Question

我需要为我的大学项目绘制一个3D条形图，条形图正在绘制中，但我希望在每个条形图上显示文本，显示其z轴的值。

这是针对2D图形显示的代码片段：源代码链路

#!/usr/bin/env python
# a bar plot with errorbars
import numpy as np
import matplotlib.pyplot as plt
N = 5
menMeans = (20, 35, 30, 35, 27)
menStd =   (2, 3, 4, 1, 2)
ind = np.arange(N)  # the x locations for the groups
width = 0.35       # the width of the bars
fig, ax = plt.subplots()
rects1 = ax.bar(ind, menMeans, width, color='r', yerr=menStd)
womenMeans = (25, 32, 34, 20, 25)
womenStd =   (3, 5, 2, 3, 3)
rects2 = ax.bar(ind+width, womenMeans, width, color='y', yerr=womenStd)
# add some text for labels, title and axes ticks
ax.set_ylabel('Scores')
ax.set_title('Scores by group and gender')
ax.set_xticks(ind+width)
ax.set_xticklabels( ('G1', 'G2', 'G3', 'G4', 'G5') )
ax.legend( (rects1[0], rects2[0]), ('Men', 'Women') )
def autolabel(rects):
    # attach some text labels
    for rect in rects:
        height = rect.get_height()
        ax.text(rect.get_x()+rect.get_width()/2., 1.05*height, '%d'%int(height),
                ha='center', va='bottom')
autolabel(rects1)
autolabel(rects2)
plt.show()

三维条形图代码是三维条形图的源代码

在2D版本中，自动标记函数使用get_height（）、get_x（）和get_width（）来动态计算高度，而在3D版本中不支持该函数：

• 找不到函数的patch3d错误

是否有将文本显示为2D图形的解决方法。

Answer 1

您可以直接从数据中提取条形图坐标，并使用igavriil指出的matplotlib.pyplot.text。对于您提供的如下示例：

# Note that z and y-axis are swapped in the plot.
for x,y in zip(xs,ys):
    ax.text(x,z,y,'%2.2f'%y, horizontalalignment='left', verticalalignment='bottom')

Answer 2

感谢igavriil的链接帮助，也感谢hr tur tur

我没有得到参数'%2.2f'%y的工作原理，可能有更干净的方法来绘制它，但我是这样绘制的：

    def autolabel():
    """ attach some text labels"""
    for i in range(0, n):
        ax.text(int(x[i])+1, y[i]-2, z[i]+0.05, str(y[i])[0:4],     color='#660066', backgroundcolor= '#c187e1', weight= 'bold', rotation='vertical', fontsize=10, horizontalalignment='left', verticalalignment='bottom')      

链接：

DropBox链接