如何在R中的三维图中绘制多个二维图?

时间:2016-08-17 06:56:20

标签: r plot scatter3d

我不确定我是否正确制定了标题/问题。也许我的一个问题是我的词汇中缺少术语。抱歉。但是试试吧:

我有数据(本例中为sleep)我将其描述为三维数据。也许一个真正的统计学家不会这样做?

我想我想将多个二维图绘制成三维图。我想并排绘制它们。如果我错了,请纠正我。

enter image description here

我的问题是,只有一行。 有两组。我想要每组一行。我认为与type='h'相同的数据给出了更好的描述:

enter image description here

你能想象这两行吗?我在这个概念中缺少什么? 我们可以使用另一个绘图库进行打印/发布。目前对我而言并不重要。也许我总是在错误的地方?

这是代码:

require('mise')
require('scatterplot3d')
mise()  # clear the workspace

# example data
print(sleep)

scatterplot3d(x=sleep$ID,
              x.ticklabs=levels(sleep$ID),
              y=sleep$group,
              y.ticklabs=levels(sleep$group),
              lab = c(length(unique(sleep$ID)), 1),
              z=sleep$extra,
              type='o')

和数据

   extra group ID
1    0.7     1  1
2   -1.6     1  2
3   -0.2     1  3
4   -1.2     1  4
5   -0.1     1  5
6    3.4     1  6
7    3.7     1  7
8    0.8     1  8
9    0.0     1  9
10   2.0     1 10
11   1.9     2  1
12   0.8     2  2
13   1.1     2  3
14   0.1     2  4
15  -0.1     2  5
16   4.4     2  6
17   5.5     2  7
18   1.6     2  8
19   4.6     2  9
20   3.4     2 10

1 个答案:

答案 0 :(得分:1)

您可以分两步手动添加这些行:

# Store the plot in rr
rr <- scatterplot3d(x=as.numeric(sleep$ID),
                    x.ticklabs=levels(sleep$ID),
                     y=sleep$group,
                     y.ticklabs=levels(sleep$group),
                     z=sleep$extra)
# find all that belong to group one
idx = sleep$group == 1
# add the first line
rr$points3d(x = sleep$ID[idx], y = rep(1, each = sum(idx)), z = sleep$extra[idx], type = 'l', col = 'red')
# add the second line
rr$points3d(x = sleep$ID[!idx], y = rep(2, each = sum(!idx)), z = sleep$extra[!idx], type = 'l', col = 'blue')

所以要添加色带而不是线条,事情会有所改变。特别是,使用polygon函数绘制色带。但是,此功能仅处理2D坐标,因此我们需要使用函数rr$xyz.convert将3D坐标转换为2D坐标。

rr <- scatterplot3d(x=sleep$ID,
                    x.ticklabs=levels(sleep$ID),
                     y=sleep$group,
                     y.ticklabs=levels(sleep$group),
                     z=sleep$extra)
idx = sleep$group == 1
# draw first group
mat = matrix(c(rep(sleep$ID[idx], 2),
               rep(c(1, 1.05), each = sum(idx)), # 1.05 determines width
               rep(sleep$extra[idx], 2)), ncol = 3)
ll = rr$xyz.convert(mat)
polygon(x = ll$x[c(1:10, 20:11)], 
        y = ll$y[c(1:10, 20:11)], col = 'red')
# draw second group
mat = matrix(c(rep(sleep$ID[!idx], 2),
               rep(c(2, 1.95), each = sum(!idx)), # 1.95 determines width
               rep(sleep$extra[!idx], 2)), ncol = 3)
ll = rr$xyz.convert(mat)
polygon(x = ll$x[c(1:10, 20:11)], 
        y = ll$y[c(1:10, 20:11)], col = 'blue')