Python绘制带注释的三维点

我有一个三维图形，我想用坐标来注释它们。但是，注释会重叠。我希望它们不要重叠

我的问题是-

• 注释重叠
• 在传说中，我不明白为什么有两个三角形和圆形的符号。不应该只有一个吗

仅供参考，我的数据集仅限于以下几点。所以，即使其他参数是硬编码的，我也没意见

这是我的密码

from mpl_toolkits.mplot3d import Axes3D
from mpl_toolkits.mplot3d import proj3d
import matplotlib.pyplot as plt
import pylab    

xData1=[ 24500.,   2980.,   2980.,  13740.]
xData2=[  8360.,   8360.,  24500.,   5670.,   2980.,   2980.,  11050.,  13740.]
yData1=[ 179.,  244.,  242.,  181.]
yData2=[ 132.,  149.,  116.,  163.,  247.,  228.,  116.,  116.]
zData1=[  1.,  44.,  86.,  44.]
zData2=[ 86.,  22.,   1.,  86.,  43.,  86.,  86.,  22.]

fig = plt.figure()
ax = fig.gca(projection='3d')

ax.plot(xData1, yData1, zData1, '^', c='r', label='cfg1')
ax.plot(xData2, yData2, zData2, 'o', c='b', label='cfg2')


for i in range(len(xData1)):
    text='['+str(int(xData1[i]))+','+str(int(yData1[i]))+','+str(int(zData1[i]))+']'    
    x2, y2, _ = proj3d.proj_transform(xData1[i],yData1[i],zData1[i], ax.get_proj())    
    label = pylab.annotate(text,
    xycoords='data', 
    xy = (x2, y2), xytext = (60, 20),
    textcoords = 'offset points', ha = 'right', va = 'bottom',
    bbox = dict(boxstyle = 'round,pad=0.5', fc = 'yellow', alpha = 0.5),
    arrowprops = dict(arrowstyle = '->', connectionstyle = 'arc3,rad=0'))


for i in range(len(xData2)):
    text='['+str(int(xData2[i]))+','+str(int(yData2[i]))+','+str(int(zData2[i]))+']'    
    x2, y2, _ = proj3d.proj_transform(xData2[i],yData2[i],zData2[i], ax.get_proj())    
    label = pylab.annotate(text,
    xycoords='data', 
    xy = (x2, y2), xytext = (20, 20),
    textcoords = 'offset points', ha = 'right', va = 'bottom',
    bbox = dict(boxstyle = 'round,pad=0.5', fc = 'yellow', alpha = 0.5),
    arrowprops = dict(arrowstyle = '->', connectionstyle = 'arc3,rad=0'))

ax.set_xlabel('X-Data')
ax.set_ylabel('Y-Data')
ax.set_zlabel('Z-Data')

ax.legend(ncol=3)
plt.show()

---

这两个问题都是相对简单的答案。我首先从第二个开始：图例中有两个符号，因为定义图例时没有指定数字，默认值为2。要更正，只需更改：

    ax.legend(ncol=3, numpoints=1)

其中

numpoints

更改图例中的点数-现在设置为1

第一个问题的答案涉及到操纵文本注释的位置，更具体地说是

xytext

，它给出了文本的坐标。将第二个for循环替换为以下内容将消除重叠文本，并为您提供一个很好的示例，说明如何更改注释框的位置以解决任何其他难看的位置问题：

    for i in range(len(xData2)):
    text='['+str(int(xData2[i]))+','+str(int(yData2[i]))+','+str(int(zData2[i]))+']'
    x2, y2, _ = proj3d.proj_transform(xData2[i],yData2[i],zData2[i], ax.get_proj())
    if i==4:
        label = pylab.annotate(text,
                       xycoords='data',
                       xy = (x2, y2), xytext = (0, -50),
                       textcoords = 'offset points', ha = 'right', va = 'bottom',
                       bbox = dict(boxstyle = 'round,pad=0.5', fc = 'yellow', alpha = 0.5),
                       arrowprops = dict(arrowstyle = '->', connectionstyle = 'arc3,rad=0'))
    elif i==6:
        label = pylab.annotate(text,
                           xycoords='data',
                           xy = (x2, y2), xytext = (-40, 0),
                           textcoords = 'offset points', ha = 'right', va = 'bottom',
                           bbox = dict(boxstyle = 'round,pad=0.5', fc = 'yellow', alpha = 0.5),
                           arrowprops = dict(arrowstyle = '->', connectionstyle = 'arc3,rad=0'))
    else:
        label = pylab.annotate(text,
                           xycoords='data',
                           xy = (x2, y2), xytext = (-20, 10),
                           textcoords = 'offset points', ha = 'right', va = 'bottom',
                           bbox = dict(boxstyle = 'round,pad=0.5', fc = 'yellow', alpha = 0.5),
                           arrowprops = dict(arrowstyle = '->', connectionstyle = 'arc3,rad=0'))