在绘图中的所有坐标之间绘制线条

我有以下数据框：

data <- data.frame(x = c(5,1,3,2,5,7,12), y = c(5,7,6,1,3,5,6))

我可以使用 ggplot 函数绘制这些坐标，并在这些坐标之间画一条线：

ggplot(data, aes(x, y)) + geom_point(size = 3) + geom_line() 

到目前为止，没有问题。但我希望在所有坐标之间绘制一条线，而不是通过坐标绘制一条线。在所有坐标之间创建一种蜘蛛网。这可能在ggplot2包裹？

如果你想在ggplot2，那么你可以使用geom_segment为了这。但在绘制这样的图之前，您必须创建一个数据框，将每个观察结果与其他观察结果连接起来。您可以按如下方式处理它：

library(ggplot2)
library(dplyr)
library(tidyr)
dat %>% 
  complete(nesting(x,y), id) %>%       # create the combinations
  select(id, xend=x, yend=y) %>%       # rename the new variables as end-points
  left_join(dat, ., by = 'id') %>%     # join with the original dataframe
  filter(!(x==xend & y==yend)) %>%     # remove the endpoints that are the same as the start points
  ggplot(., aes(x, y)) + 
  geom_segment(aes(x = x, y = y, xend = xend, yend = yend)) +
  geom_label(aes(x = x, y = y, label = id, color = factor(id)), show.legend = FALSE) +
  theme_minimal(base_size = 14) +
  theme(axis.title = element_blank())

这使：

使用数据：

dat <- data.frame(x = c(5,1,3,2,5,7,12), y = c(5,7,6,1,3,5,6))
dat$id <- 1:nrow(dat)

或者，您也可以动态添加 row-id，而无需事先执行：

dat %>% 
  mutate(id = row_number()) %>%        # add a row id
  complete(nesting(x,y), id) %>%       # create the combinations
  select(id, xend=x, yend=y) %>%       # rename the new variables as end-points
  left_join(dat %>% mutate(id = row_number()), .,
            by = 'id') %>%             # join with the original dataframe (also with an added row id)
  filter(!(x==xend & y==yend)) %>%     # remove the endpoints that are the same as the start points
  ggplot(., aes(x, y)) + 
  geom_segment(aes(x = x, y = y, xend = xend, yend = yend)) +
  geom_label(aes(x = x, y = y, label = id, color = factor(id)), show.legend = FALSE) +
  theme_minimal(base_size = 14) +
  theme(axis.title = element_blank())