ggplot 不会标记点

【问题标题】：ggplot won't label pointsggplot 不会标记点
【发布时间】：2011-07-27 16:32:28
【问题描述】：

我现在尝试了超过 1.5 小时，但我无法让标签工作... :-\

我有以下矩阵 clVrd

            [,1]        [,2] [,3]
 [1,]  0.6618725 -0.04065907    1
 [2,]  0.4646620  0.09859806    2
 [3,]  0.9388307  0.05681554    3
 [4,]  1.1809942  0.12906415    4
 [5,]  1.5476428  0.49644973    5
 [6,] -0.1855485  0.30445869    6
 [7,]  0.4525888  0.49559198    7
 [8,] -0.4004534 -0.06419374    8
 [9,] -1.0669191  0.17292748    9
[10,] -0.9372038  0.02601539   10
[11,]  0.5617849 -5.21857716   11
[12,] -0.9370099 -0.05539107   12
[13,]  0.6803453  0.21223368   13
[14,]  1.3040601  0.47598799   14

我尝试使用以下命令绘制它

ggplot() + geom_point(data=data.frame(clVrd), mapping=aes(x=clVrd[,1], y=clVrd[,2], label=clVrd[,3]))

即使我在 clVrd 中设置行名

rownames(clVrd) <- seq(1:14)

还是不行。情节已绘制，但没有标签...... 谁能告诉我为什么？

感谢您的帮助！

更新： daroczig 提到的方式有效，但我需要在更复杂的图中添加图层。

整个代码是：

ggplot() + geom_segment(data=data.frame(test), aes(x=lines[,1], y=lines[,2], xend=lines[,3], yend=lines[,4]), color='grey', alpha = I(0.2)) +
  layer(data=data.frame(clVrd), mapping=aes(x=clVrd[,1], y=clVrd[,2], label=clVrd[,3]), geom = "point", stat="identity", size = I(4), color='black', shape=2) +
  layer(data=data.frame(mid), mapping=aes(x=mid[,1], y=mid[,2]), geom = "point", stat="identity", size = I(4), color='black', shape=22) +
  opts(legend.position = "none") +
  scale_x_continuous('Dimension 1') +
  scale_y_continuous('Dimension 2') +
  opts(axis.title.y = theme_text(vjust=0.2, angle=90)) +
  opts(axis.title.x = theme_text(vjust=0.2, angle=0))

clVrd <- structure(c(0.661872475367366, 0.464661963750941, 0.938830748772559, 
1.18099419280727, 1.54764276890947, -0.185548540145922, 0.452588804431998, 
-0.400453362842998, -1.06691910257802, -0.937203794581474, 0.56178488859136, 
-0.937009852049824, 0.680345320757602, 1.30406005677017, -0.0406590744874299, 
0.0985980588613432, 0.0568155367351373, 0.129064147637601, 0.496449734351345, 
0.304458694719769, 0.495591983450893, -0.0641937419346143, 0.172927477311218, 
0.0260153913187109, -5.21857716109913, -0.0553910678963988, 0.212233679072247, 
0.475987991276203, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 
14), .Dim = c(14L, 3L))

mid <- structure(c(-0.195877196644293, 0.511580674503935, -0.658596511353487, 
0.468086299528672, -1.24317797052758, -2.35077729859073, -0.55472838558667, 
0.131409158984094, 0.759205542363384, 0.824786100242867, -1.86673280298486, 
-0.482522295670435, 0.301242780883547, 0.414223673077983, 0.262357298984787, 
-1.49648725810236, 0.238301422916755, 0.0954886028288132, -2.13935195209412, 
0.340899933083442, -0.816182528789355, 0.515281428093344, 0.134447522792538, 
-4.09755608083992), .Dim = c(12L, 2L))

lines <- structure(c(0.661872475367366, 0.661872475367366, 0.661872475367366, 
0.661872475367366, 0.661872475367366, 0.661872475367366, 0.661872475367366, 
0.661872475367366, 0.661872475367366, 0.661872475367366, 0.464661963750941, 
0.464661963750941, 0.464661963750941, 0.464661963750941, 0.464661963750941, 
0.464661963750941, 0.464661963750941, 0.464661963750941, 0.464661963750941, 
0.464661963750941, 0.938830748772559, 0.938830748772559, 0.938830748772559, 
0.938830748772559, 0.938830748772559, 0.938830748772559, 0.938830748772559, 
0.938830748772559, 0.938830748772559, 0.938830748772559, 1.18099419280727, 
1.18099419280727, 1.18099419280727, 1.18099419280727, 1.18099419280727, 
1.18099419280727, 1.18099419280727, 1.18099419280727, 1.18099419280727, 
1.18099419280727, 1.54764276890947, 1.54764276890947, 1.54764276890947, 
1.54764276890947, 1.54764276890947, 1.54764276890947, 1.54764276890947, 
1.54764276890947, 1.54764276890947, -0.185548540145922, -0.185548540145922, 
-0.185548540145922, -0.185548540145922, -0.185548540145922, -0.185548540145922, 
-0.185548540145922, -0.185548540145922, -0.185548540145922, -0.185548540145922, 
-0.185548540145922, 0.452588804431998, 0.452588804431998, 0.452588804431998, 
0.452588804431998, 0.452588804431998, 0.452588804431998, 0.452588804431998, 
0.452588804431998, 0.452588804431998, 0.452588804431998, -0.400453362842998, 
-0.400453362842998, -0.400453362842998, -0.400453362842998, -0.400453362842998, 
-0.400453362842998, -0.400453362842998, -0.400453362842998, -0.400453362842998, 
-0.400453362842998, -0.400453362842998, -1.06691910257802, -1.06691910257802, 
-1.06691910257802, -1.06691910257802, -1.06691910257802, -1.06691910257802, 
-1.06691910257802, -1.06691910257802, -1.06691910257802, -1.06691910257802, 
-1.06691910257802, -1.06691910257802, -0.937203794581474, -0.937203794581474, 
-0.937203794581474, -0.937203794581474, -0.937203794581474, -0.937203794581474, 
-0.937203794581474, -0.937203794581474, -0.937203794581474, -0.937203794581474, 
-0.937203794581474, -0.937203794581474, 0.56178488859136, 0.56178488859136, 
0.56178488859136, 0.56178488859136, -0.937009852049824, -0.937009852049824, 
-0.937009852049824, -0.937009852049824, -0.937009852049824, -0.937009852049824, 
-0.937009852049824, -0.937009852049824, -0.937009852049824, -0.937009852049824, 
-0.937009852049824, -0.937009852049824, 0.680345320757602, 0.680345320757602, 
0.680345320757602, 0.680345320757602, 0.680345320757602, 0.680345320757602, 
0.680345320757602, 0.680345320757602, 0.680345320757602, 0.680345320757602, 
-0.0406590744874299, -0.0406590744874299, -0.0406590744874299, 
-0.0406590744874299, -0.0406590744874299, -0.0406590744874299, 
-0.0406590744874299, -0.0406590744874299, -0.0406590744874299, 
-0.0406590744874299, 0.0985980588613432, 0.0985980588613432, 
0.0985980588613432, 0.0985980588613432, 0.0985980588613432, 0.0985980588613432, 
0.0985980588613432, 0.0985980588613432, 0.0985980588613432, 0.0985980588613432, 
0.0568155367351373, 0.0568155367351373, 0.0568155367351373, 0.0568155367351373, 
0.0568155367351373, 0.0568155367351373, 0.0568155367351373, 0.0568155367351373, 
0.0568155367351373, 0.0568155367351373, 0.129064147637601, 0.129064147637601, 
0.129064147637601, 0.129064147637601, 0.129064147637601, 0.129064147637601, 
0.129064147637601, 0.129064147637601, 0.129064147637601, 0.129064147637601, 
0.496449734351345, 0.496449734351345, 0.496449734351345, 0.496449734351345, 
0.496449734351345, 0.496449734351345, 0.496449734351345, 0.496449734351345, 
0.496449734351345, 0.304458694719769, 0.304458694719769, 0.304458694719769, 
0.304458694719769, 0.304458694719769, 0.304458694719769, 0.304458694719769, 
0.304458694719769, 0.304458694719769, 0.304458694719769, 0.304458694719769, 
0.495591983450893, 0.495591983450893, 0.495591983450893, 0.495591983450893, 
0.495591983450893, 0.495591983450893, 0.495591983450893, 0.495591983450893, 
0.495591983450893, 0.495591983450893, -0.0641937419346143, -0.0641937419346143, 
-0.0641937419346143, -0.0641937419346143, -0.0641937419346143, 
-0.0641937419346143, -0.0641937419346143, -0.0641937419346143, 
-0.0641937419346143, -0.0641937419346143, -0.0641937419346143, 
0.172927477311218, 0.172927477311218, 0.172927477311218, 0.172927477311218, 
0.172927477311218, 0.172927477311218, 0.172927477311218, 0.172927477311218, 
0.172927477311218, 0.172927477311218, 0.172927477311218, 0.172927477311218, 
0.0260153913187109, 0.0260153913187109, 0.0260153913187109, 0.0260153913187109, 
0.0260153913187109, 0.0260153913187109, 0.0260153913187109, 0.0260153913187109, 
0.0260153913187109, 0.0260153913187109, 0.0260153913187109, 0.0260153913187109, 
-5.21857716109913, -5.21857716109913, -5.21857716109913, -5.21857716109913, 
-0.0553910678963988, -0.0553910678963988, -0.0553910678963988, 
-0.0553910678963988, -0.0553910678963988, -0.0553910678963988, 
-0.0553910678963988, -0.0553910678963988, -0.0553910678963988, 
-0.0553910678963988, -0.0553910678963988, -0.0553910678963988, 
0.212233679072247, 0.212233679072247, 0.212233679072247, 0.212233679072247, 
0.212233679072247, 0.212233679072247, 0.212233679072247, 0.212233679072247, 
0.212233679072247, 0.212233679072247, -0.195877196644293, 0.511580674503935, 
-0.658596511353487, 0.468086299528672, -1.24317797052758, -0.55472838558667, 
0.131409158984094, 0.759205542363384, 0.824786100242867, -0.482522295670435, 
-0.195877196644293, 0.511580674503935, -0.658596511353487, 0.468086299528672, 
-1.24317797052758, -0.55472838558667, 0.131409158984094, 0.759205542363384, 
0.824786100242867, -0.482522295670435, -0.195877196644293, 0.511580674503935, 
-0.658596511353487, 0.468086299528672, -1.24317797052758, -0.55472838558667, 
0.131409158984094, 0.759205542363384, 0.824786100242867, -0.482522295670435, 
-0.195877196644293, 0.511580674503935, -0.658596511353487, 0.468086299528672, 
-1.24317797052758, -0.55472838558667, 0.131409158984094, 0.759205542363384, 
0.824786100242867, -0.482522295670435, -0.195877196644293, 0.511580674503935, 
-0.658596511353487, 0.468086299528672, -0.55472838558667, 0.131409158984094, 
0.759205542363384, 0.824786100242867, -0.482522295670435, -0.195877196644293, 
0.511580674503935, -0.658596511353487, 0.468086299528672, -1.24317797052758, 
-0.55472838558667, 0.131409158984094, 0.759205542363384, 0.824786100242867, 
-1.86673280298486, -0.482522295670435, -0.195877196644293, 0.511580674503935, 
-0.658596511353487, 0.468086299528672, -1.24317797052758, -0.55472838558667, 
0.131409158984094, 0.759205542363384, 0.824786100242867, -0.482522295670435, 
-0.195877196644293, 0.511580674503935, -0.658596511353487, 0.468086299528672, 
-1.24317797052758, -0.55472838558667, 0.131409158984094, 0.759205542363384, 
0.824786100242867, -1.86673280298486, -0.482522295670435, -0.195877196644293, 
0.511580674503935, -0.658596511353487, 0.468086299528672, -1.24317797052758, 
-2.35077729859073, -0.55472838558667, 0.131409158984094, 0.759205542363384, 
0.824786100242867, -1.86673280298486, -0.482522295670435, -0.195877196644293, 
0.511580674503935, -0.658596511353487, 0.468086299528672, -1.24317797052758, 
-2.35077729859073, -0.55472838558667, 0.131409158984094, 0.759205542363384, 
0.824786100242867, -1.86673280298486, -0.482522295670435, 0.468086299528672, 
-0.55472838558667, 0.759205542363384, -0.482522295670435, -0.195877196644293, 
0.511580674503935, -0.658596511353487, 0.468086299528672, -1.24317797052758, 
-2.35077729859073, -0.55472838558667, 0.131409158984094, 0.759205542363384, 
0.824786100242867, -1.86673280298486, -0.482522295670435, -0.195877196644293, 
0.511580674503935, -0.658596511353487, 0.468086299528672, -1.24317797052758, 
-0.55472838558667, 0.131409158984094, 0.759205542363384, 0.824786100242867, 
-0.482522295670435, 0.301242780883547, 0.414223673077983, 0.262357298984787, 
-1.49648725810236, 0.238301422916755, -2.13935195209412, 0.340899933083442, 
-0.816182528789355, 0.515281428093344, -4.09755608083992, 0.301242780883547, 
0.414223673077983, 0.262357298984787, -1.49648725810236, 0.238301422916755, 
-2.13935195209412, 0.340899933083442, -0.816182528789355, 0.515281428093344, 
-4.09755608083992, 0.301242780883547, 0.414223673077983, 0.262357298984787, 
-1.49648725810236, 0.238301422916755, -2.13935195209412, 0.340899933083442, 
-0.816182528789355, 0.515281428093344, -4.09755608083992, 0.301242780883547, 
0.414223673077983, 0.262357298984787, -1.49648725810236, 0.238301422916755, 
-2.13935195209412, 0.340899933083442, -0.816182528789355, 0.515281428093344, 
-4.09755608083992, 0.301242780883547, 0.414223673077983, 0.262357298984787, 
-1.49648725810236, -2.13935195209412, 0.340899933083442, -0.816182528789355, 
0.515281428093344, -4.09755608083992, 0.301242780883547, 0.414223673077983, 
0.262357298984787, -1.49648725810236, 0.238301422916755, -2.13935195209412, 
0.340899933083442, -0.816182528789355, 0.515281428093344, 0.134447522792538, 
-4.09755608083992, 0.301242780883547, 0.414223673077983, 0.262357298984787, 
-1.49648725810236, 0.238301422916755, -2.13935195209412, 0.340899933083442, 
-0.816182528789355, 0.515281428093344, -4.09755608083992, 0.301242780883547, 
0.414223673077983, 0.262357298984787, -1.49648725810236, 0.238301422916755, 
-2.13935195209412, 0.340899933083442, -0.816182528789355, 0.515281428093344, 
0.134447522792538, -4.09755608083992, 0.301242780883547, 0.414223673077983, 
0.262357298984787, -1.49648725810236, 0.238301422916755, 0.0954886028288132, 
-2.13935195209412, 0.340899933083442, -0.816182528789355, 0.515281428093344, 
0.134447522792538, -4.09755608083992, 0.301242780883547, 0.414223673077983, 
0.262357298984787, -1.49648725810236, 0.238301422916755, 0.0954886028288132, 
-2.13935195209412, 0.340899933083442, -0.816182528789355, 0.515281428093344, 
0.134447522792538, -4.09755608083992, -1.49648725810236, -2.13935195209412, 
-0.816182528789355, -4.09755608083992, 0.301242780883547, 0.414223673077983, 
0.262357298984787, -1.49648725810236, 0.238301422916755, 0.0954886028288132, 
-2.13935195209412, 0.340899933083442, -0.816182528789355, 0.515281428093344, 
0.134447522792538, -4.09755608083992, 0.301242780883547, 0.414223673077983, 
0.262357298984787, -1.49648725810236, 0.238301422916755, -2.13935195209412, 
0.340899933083442, -0.816182528789355, 0.515281428093344, -4.09755608083992
), .Dim = c(131L, 4L))

这不起作用... 不能先绘制这一层

【问题讨论】：

    标签： r plot ggplot2


    【解决方案1】：

    首先，显示您的数据的方式应该可以轻松粘贴到其他人的 R 会话中（正如我在您的其他主题中所写的那样），例如：

    > dput(clVrd)
structure(list(x = c(0.464662, 0.9388307, 1.1809942, 1.5476428, 
-0.1855485, 0.4525888, -0.4004534, -1.0669191, -0.9372038, 0.5617849, 
-0.9370099, 0.6803453, 1.3040601), y = c(0.09859806, 0.05681554, 
0.12906415, 0.49644973, 0.30445869, 0.49559198, -0.06419374, 
0.17292748, 0.02601539, -5.21857716, -0.05539107, 0.21223368, 
0.47598799), label = 2:14), .Names = c("x", "y", "label"), class = "data.frame", row.names = c(NA, 
-13L))

    或者像你一样，但没有行名！无论如何：

    如果我是对的，geom_point 只是没有label 参数，所以不值得尝试这种方式。你应该在打印你的点后添加一个额外的层，例如geom_text的帮助，比如：

    ggplot(clVrd, aes(x=x, y=y, label=label)) + geom_point() + geom_text()

    您可能希望将下方/左/右等的文本从点移开。

    更新：基于 OP 更新

    首先，正如@hadley 指出的那样：将矩阵转换为数据框并命名变量是一种很好的做法：

    clVdr <- as.data.frame(clVdr)
names(clVdr) <- c('x', 'y', 'label')
mid <- as.data.frame(mid)
names(mid) <- c('x', 'y')
lines <- as.data.frame(lines)
names(lines) <- c('x', 'y', 'xend', 'yend')

    使用上述命令可以轻松扩展您相当复杂的解决方案：

    ggplot(mapping = aes(x, y)) + 
  geom_segment(data=lines, aes(xend = xend, yend = yend), 
    color = 'grey', alpha = 0.2) +
  geom_point(data = clVdr, size = 4, shape = 2) +
  geom_point(data = mid, size = 4, shape = 22) +
  geom_text(data = clVdr, aes(label=label), hjust = 0, vjust = 0) +
  opts(legend.position = "none") +
  scale_x_continuous('Dimension 1') +
  scale_y_continuous('Dimension 2') +
  opts(axis.title.y = theme_text(vjust = 0.2, angle = 90)) +
  opts(axis.title.x = theme_text(vjust = 0.2, angle = 0)) +
  theme_bw()

    我还添加了theme_bw() 只是为了满足我的口味:) 这导致：​​

    【讨论】：

    • 感谢数据提示，下次我会记住的。
    • 我无法在评论中发布更长的帖子，也无法在 8 小时内回答我的问题......所以我编辑了我原来的问题......
    • 好的，我找到了解决方案。解决方案是添加行geom_text(aes(label=clVrd[,3], x=clVrd[,1], y=clVrd[,2]), hjust=0, vjust=0) 明天我可以回答我的问题时发布整个命令...
    • 我根据您修改后的问题更新了我的答案。我希望你是这个意思。
    • 好的，非常感谢。这就是解决方案。您知道是否有一种方法可以避免在将点缝合在一起时过度绘制数字？顺便提一句。我也使用了theme_bw()...看起来好多了！
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