plotly 中 3d 线图的连接点问题答案

【问题标题】：Issue with connecting points for 3d line plot in plotlyplotly 中 3d 线图的连接点问题
【发布时间】：2020-11-11 07:12:53
【问题描述】：

我有以下格式的数据框：

       x    y    z aa_num frame_num cluster
1   1.86 3.11 8.62      1         1       1
2   1.77 3.32 8.31      2         1       1
3   1.59 3.17 8.00      3         1       1
4   1.67 3.49 7.81      4         1       1
5   2.04 3.59 7.81      5         1       1
6   2.20 3.34 7.57      6         1       1
7   2.09 3.19 7.25      7         1       1
8   2.13 3.30 6.89      8         1       1
9   2.17 3.63 6.70      9         1       1
10  2.22 3.63 6.33     10         1       1
11  2.06 3.83 6.04     11         1       1
12  2.31 3.75 5.76     12         1       1
13  2.15 3.45 5.59     13         1       1
14  2.21 3.28 5.26     14         1       1
15  2.00 3.13 4.98     15         1       1
16  2.13 2.86 4.74     16         1       1
17  1.97 2.78 4.41     17         1       1
18  2.20 2.76 4.10     18         1       1
19  2.43 2.46 4.14     19         1       1
20  2.34 2.23 3.85     20         1       1
21  2.61 2.16 3.59     21         1       1
22  2.42 1.92 3.36     22         1       1
23  2.44 1.95 2.98     23         1       1
24  2.26 1.62 2.94     24         1       1
25  2.19 1.35 3.20     25         1       1
26  1.92 1.11 3.08     26         1       1
27  1.93 0.83 3.33     27         1       1
28  1.83 0.72 3.68     28         1       1
29  1.95 0.47 3.95     29         1       1
30  1.84 0.36 4.29     30         1       1
31  0.56 3.93 7.07      1         2       1
32  0.66 3.84 7.42      2         2       1
33  0.87 3.54 7.49      3         2       1
34  0.84 3.19 7.33      4         2       1
35  0.76 3.32 6.98      5         2       1
36  0.88 3.23 6.63      6         2       1
37  1.10 3.46 6.43      7         2       1
38  1.35 3.49 6.15      8         2       1
39  1.72 3.50 6.23      9         2       1
40  1.88 3.67 5.93     10         2       1
41  2.25 3.72 5.97     11         2       1
42  2.43 3.48 5.74     12         2       1
43  2.23 3.35 5.44     13         2       1
44  2.23 3.38 5.06     14         2       1
45  2.01 3.38 4.76     15         2       1
46  2.02 3.44 4.38     16         2       1
47  1.98 3.10 4.20     17         2       1
48  2.05 3.13 3.83     18         2       1
49  2.28 2.85 3.72     19         2       1
50  2.09 2.56 3.58     20         2       1
51  2.21 2.37 3.27     21         2       1
52  2.06 2.04 3.15     22         2       1
53  1.93 2.01 2.80     23         2       1
54  1.86 1.64 2.83     24         2       1
55  1.95 1.38 3.10     25         2       1
56  1.78 1.04 3.04     26         2       1
57  1.90 0.84 3.34     27         2       1
58  1.83 0.74 3.70     28         2       1
59  1.95 0.48 3.95     29         2       1
60  1.84 0.36 4.29     30         2       1
etc..

我正在尝试创建此数据的 3d 线图，其中将为每个 frame_num 绘制一条由 30 个点组成的线，并且这些点将按 aa_num 的顺序连接。执行此操作的代码如下：

    fig = plot_ly(output_cl, x = ~x, y = ~y, z = ~z, type = 'scatter3d', mode = 'lines+markers',
                   opacity = 1, line = list(width = 1, color = ~frame_num, colorscale = 'Viridis'),
                  marker = list(size = 2, color = ~frame_num, colorscale = 'Viridis'))

当我绘制单个帧时，它工作正常：

但是，当我尝试绘制多个实例时，会出现一个奇怪的问题。

由于某种原因，当我尝试绘制第 1 帧和第 2 帧时，第 2 帧的第 1 点和第 30 点相互连接。但是，第 1 帧不会发生这种情况。有什么想法吗？有没有办法在 plotly 中指定 3d 中点的顺序？

【问题讨论】：

标签： python r plotly data-visualization

【解决方案1】：

如果您想基于列frame_num 创建两个不同的跟踪，您需要使用factor 将其作为分类变量传递。作为替代方案，您可以使用name = ~ frame_num 或split = ~ frame_num 创建多个跟踪。

library(plotly)

output_cl <- data.frame(
           x = c(1.86,1.77,1.59,1.67,2.04,2.2,2.09,
                 2.13,2.17,2.22,2.06,2.31,2.15,2.21,2,2.13,1.97,2.2,
                 2.43,2.34,2.61,2.42,2.44,2.26,2.19,1.92,1.93,1.83,1.95,
                 1.84,0.56,0.66,0.87,0.84,0.76,0.88,1.1,1.35,1.72,1.88,
                 2.25,2.43,2.23,2.23,2.01,2.02,1.98,2.05,2.28,2.09,
                 2.21,2.06,1.93,1.86,1.95,1.78,1.9,1.83,1.95,1.84),
           y = c(3.11,3.32,3.17,3.49,3.59,3.34,3.19,
                 3.3,3.63,3.63,3.83,3.75,3.45,3.28,3.13,2.86,2.78,2.76,
                 2.46,2.23,2.16,1.92,1.95,1.62,1.35,1.11,0.83,0.72,
                 0.47,0.36,3.93,3.84,3.54,3.19,3.32,3.23,3.46,3.49,3.5,
                 3.67,3.72,3.48,3.35,3.38,3.38,3.44,3.1,3.13,2.85,2.56,
                 2.37,2.04,2.01,1.64,1.38,1.04,0.84,0.74,0.48,0.36),
           z = c(8.62,8.31,8,7.81,7.81,7.57,7.25,6.89,
                 6.7,6.33,6.04,5.76,5.59,5.26,4.98,4.74,4.41,4.1,
                 4.14,3.85,3.59,3.36,2.98,2.94,3.2,3.08,3.33,3.68,3.95,
                 4.29,7.07,7.42,7.49,7.33,6.98,6.63,6.43,6.15,6.23,5.93,
                 5.97,5.74,5.44,5.06,4.76,4.38,4.2,3.83,3.72,3.58,
                 3.27,3.15,2.8,2.83,3.1,3.04,3.34,3.7,3.95,4.29),
      aa_num = c(1L,2L,3L,4L,5L,6L,7L,8L,9L,10L,
                 11L,12L,13L,14L,15L,16L,17L,18L,19L,20L,21L,22L,23L,
                 24L,25L,26L,27L,28L,29L,30L,1L,2L,3L,4L,5L,6L,7L,
                 8L,9L,10L,11L,12L,13L,14L,15L,16L,17L,18L,19L,20L,
                 21L,22L,23L,24L,25L,26L,27L,28L,29L,30L),
   frame_num = c(1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,
                 1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,
                 1L,1L,1L,2L,2L,2L,2L,2L,2L,2L,2L,2L,2L,2L,2L,
                 2L,2L,2L,2L,2L,2L,2L,2L,2L,2L,2L,2L,2L,2L,2L,2L,
                 2L,2L),
     cluster = c(1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,
                 1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,
                 1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,
                 1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,1L,
                 1L,1L)
)

fig = plot_ly(output_cl, x = ~x, y = ~y, z = ~z, type = 'scatter3d', mode = 'lines+markers', color = ~factor(frame_num), # or name = ~ frame_num or split = ~ frame_num
              colors ="Set2", opacity = 1, line = list(width = 1), marker = list(size = 2))
fig

【讨论】：