ggplot:删除功能区边缘的线条

Question

我ggplot用来绘制时间过程数据(随着时间的推移固定比例到屏幕上的不同对象)并想要使用功能区来显示SE,但是功能区本身在顶部和底部边缘都有线条,这使得读取图形a有点难.我无法弄清楚如何摆脱这些边缘线.这是我的情节代码:

ggplot(d, aes(Time, y, color = Object, fill = Object)) +
  stat_summary(fun.y = "mean", geom = "line", size = 2) +
  stat_summary(fun.data = "mean_se", geom = "ribbon", alpha = .3)

有什么建议？

这是一个最小的工作示例.我已将我的数据压缩为:

   Time Object          y      lower     upper
 1 1000      C 0.12453389 0.04510504 0.2039627
 2 1000      T 0.58826856 0.37615078 0.8003864
 3 1000      U 0.09437160 0.03278069 0.1559625
 4 1100      C 0.12140127 0.03943988 0.2033627
 5 1100      T 0.64560823 0.44898727 0.8422292
 6 1100      U 0.06725172 0.01584248 0.1186610

d <- structure(list(Time = c(1000L, 1000L, 1000L, 1100L, 1100L, 1100L), Object = structure(c(1L, 2L, 3L, 1L, 2L, 3L), .Label = c("C", 
"T", "U"), class = "factor"), y = c(0.12453389, 0.58826856, 0.0943716, 
0.12140127, 0.64560823, 0.06725172), lower = c(0.04510504, 0.37615078, 
0.03278069, 0.03943988, 0.44898727, 0.01584248), upper = c(0.2039627, 
0.8003864, 0.1559625, 0.2033627, 0.8422292, 0.118661)), .Names = c("Time", 
"Object", "y", "lower", "upper"), class = "data.frame", row.names = c("1", 
"2", "3", "4", "5", "6"))

这是新的情节代码:

ggplot(d, aes(Time, y, color = Object, fill = Object)) +
  geom_line(size = 2) +
  geom_ribbon(aes(ymin = lower, ymax = upper), alpha = .3)

Answer 1

您可以使用colour参数删除边框:

ggplot(d, aes(Time, y, color = Object, fill = Object)) +
  geom_line(size = 2) +
  geom_ribbon(aes(ymin = lower, ymax = upper), alpha = .3, colour = NA)

Answer 2

geom_ribbon理解linetype美学.如果你想将linetype映射到变量,请在aes()参数中包含它,否则,将linetype放在外面并给它linetype,就像这样:

ggplot(d, aes(Time, y, color = Object, fill = Object)) +
  geom_line(size = 2) +
  geom_ribbon(aes(ymin = lower, ymax = upper), linetype = 0, alpha = .3)

更多信息:http://docs.ggplot2.org/current/geom_ribbon.html

Answer 3

ggplot2现在包含geom_ribbon()一个outline.type参数，可帮助控制功能区轮廓的显示方式。

轮廓类型

library(tidyverse)

huron <- tibble(year = 1875:1972, level = as.vector(LakeHuron))

huron %>%
    ggplot(aes(year, level)) +
    geom_ribbon(aes(ymin = level - 1, ymax = level + 1), 
                fill = "grey70", color = "red", 
                outline.type = "lower") +
    geom_line(aes(y = level))

^{由reprex 包(v0.3.0)于 2020-05-28 创建}

线型 = 0

或者，按照建议，我们可以设置linetype = 0删除所有行。

library(tidyverse)

huron <- tibble(year = 1875:1972, level = as.vector(LakeHuron))

huron %>%
    ggplot(aes(year, level)) +
    geom_ribbon(aes(ymin = level - 1, ymax = level + 1), 
                fill = "grey70", color = "red", linetype = 0) +
    geom_line(aes(y = level))

^{由reprex 包(v0.3.0)于 2020-05-28 创建}