ggplot: remove lines at ribbon edges
I am using ggplot
to plot time course data (fixation proportions over time to different objects on the screen) and want to use a ribbon to show the SE, but the ribbon itself has lines at the top and bottom edges, which makes reading the graph a bit harder. I haven't been able to figure out how to get rid of those edge lines. Here is my plot code:
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)
Any suggestions?
Here is a minimal working example. I've compressed my data to:
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"))
and here is the new plot code:
ggplot(d, aes(Time, y, color = Object, fill = Object)) +
geom_line(size = 2) +
geom_ribbon(aes(ymin = lower, ymax = upper), alpha = .3)
You can remove the border using the colour
argument:
ggplot(d, aes(Time, y, color = Object, fill = Object)) +
geom_line(size = 2) +
geom_ribbon(aes(ymin = lower, ymax = upper), alpha = .3, colour = NA)
geom_ribbon
understands linetype
aesthetic. If you want to map linetype to a variable include it in the aes()
argument, otherwise, place linetype
outside and just give it 0
, like so:
ggplot(d, aes(Time, y, color = Object, fill = Object)) +
geom_line(size = 2) +
geom_ribbon(aes(ymin = lower, ymax = upper), linetype = 0, alpha = .3)
More info here: http://docs.ggplot2.org/current/geom_ribbon.html
ggplot2
's geom_ribbon()
now includes an outline.type
argument that helps control how the ribbon outlines are displayed.
Outline Type
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))
Created on 2020-05-28 by the reprex package (v0.3.0)
Linetype = 0
Alternatively, as suggested we can set linetype = 0
to remove all lines.
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))
Created on 2020-05-28 by the reprex package (v0.3.0)
Here you go
ggplot(d, aes(Time, y, fill=Object)) +
geom_line(size=2, aes(colour = Object)) +
geom_ribbon(aes(ymin=lower, ymax=upper), alpha=.3)