I created a plot successfully, with 2 facets. However, there is a third grouping factor I would like to create - the first four columns should be labeled "A" and the last four "B" with the titles centered but along the same row. I've added an image of what I am looking for. Does anyone know how to do this in ggplot2? It would also be great to have some sort of blank column separating the two groups visually. I would just create 2 plots and join them, but the problem is that adding the axes on the left-most group makes the boxes smaller than the latter four boxes. I don't include the axes here for confidentiality.
Here is my code
Carbon.p<-ggplot(data.QC.1[!data.QC.1$hemiparasite %in% c("TRER", "TRVE", "CAHI"),], aes(x=type.full, y = Value))
# geom_point(aes(color=type.full))
stat_summary(fun = "mean", shape = "-", size = 2.5)
scale_color_manual(values = c("#de2d26" ,"#9ebcda", "#8856a7"))
facet_grid(host ~ hemiparasite, scales= "free", switch = "y")
theme_bw()
geom_jitter(aes(color = type.full), alpha = 0.5))
theme(text = element_text(size = 10),
panel.grid.minor = element_blank(),
panel.grid.major = element_blank(),
# panel.border = element_blank(),
axis.line.x = element_blank(),
axis.text.y = element_blank(),
axis.ticks.y = element_blank(),
axis.line.y = element_blank(),
legend.title= element_blank(),
legend.position = "bottom",
axis.text.x = element_blank(),
axis.ticks.x = element_blank(),
legend.key = element_blank(),
strip.background = element_rect(colour="black", fill="white"),
# strip.text.y = element_blank())
# axis.text.x = element_text(hjust = 0.5, angle = 90)) ## why isn't this working
labs(x = expression(""),
y = expression("d13C"),
title = "")
Thanks!
CodePudding user response:
Option 1 - use annotations or geom_text outside the plot range, constraining the view window with coord_cartesian
and clip = off
.
library(ggplot2); library(dplyr)
mtcars %>%
mutate(label = "") %>%
add_row(wt = 3.5, mpg = 42, am = 0, carb = c(2, 6), label = c("A", "B")) %>%
ggplot(aes(wt, mpg, label = label))
geom_point(data = . %>% filter(label == ""))
geom_text()
facet_grid(am~carb)
coord_cartesian(ylim = c(10,35), clip = "off")
theme(plot.margin = unit(c(1,0,0,0), "line"))
Option 2 - Two separate charts joined with patchwork
.
library(patchwork)
plot_carbs <- function(my_carbs, label, axis = TRUE) {
mtcars %>%
filter(carb %in% my_carbs) %>%
ggplot(aes(wt, mpg))
geom_point()
facet_grid(am~carb)
labs(title = label)
theme(plot.title = element_text(hjust = 0.5))
{ if(!axis) theme(
axis.text.y = element_blank(),
axis.ticks.y = element_blank(),
axis.title.y = element_blank()) }
coord_cartesian(xlim = c(1.5, 6), ylim = c(10,35))
}
plot_carbs(1:3, "A")
plot_carbs(c(4,6,8), "B", FALSE)