[英]How to define common y-axis limits when using facet_grid() in ggplot2
My third post here.我在这里的第三个帖子。 I am leading the plot design using lines and areas in
ggplot2
with facet_grid()
.我正在使用带有
facet_grid()
的ggplot2
中的线条和区域来领导 plot 设计。 The code works well.代码运行良好。 Here is the data I used:
这是我使用的数据:
#My data
df <- structure(list(Var = structure(c(1L, 2L, 3L, 4L, 5L, 6L, 7L,
8L, 9L, 10L, 11L, 12L, 1L, 2L, 3L, 4L, 5L, 6L, 7L, 8L, 9L, 10L,
11L, 12L), .Label = c("1", "2", "3", "4", "5", "6", "7", "8",
"9", "10", "11", "12"), class = c("ordered", "factor")), Val = c(46.0233614780009,
85.6471698498353, 83.8100037071854, 98.6977939726785, 94.0682111307979,
92.1834012959152, 79.1579962009564, 62.9422475816682, 2.36891501117498,
25.3718703053892, 87.2779565863311, 32.0944497128949, 444.363995105959,
337.84707041923, 93.2718054391444, 171.342949266545, 81.6757546272129,
135.7353850035, 286.496924120001, 450.293861329556, 339.913251576945,
80.7274857070297, 122.17661133036, 370.043645612895), Group = c("Up",
"Up", "Up", "Up", "Up", "Up", "Up", "Up", "Up", "Up", "Up", "Up",
"Down", "Down", "Down", "Down", "Down", "Down", "Down", "Down",
"Down", "Down", "Down", "Down")), row.names = c(NA, -24L), class = "data.frame")
Now this is my plot:现在这是我的 plot:
library(ggplot2)
library(dplyr)
#Code for the plot
df %>%
mutate(Val=ifelse(Group=='Down',-Val,Val),
Group=factor(Group,levels = c('Up','Down'),ordered = T)) %>%
ggplot(aes(x=Var,y=Val,color=Group,fill=Group,group=Group))+
geom_line(size=1)+geom_area(alpha=0.75)+
facet_grid(Group~.,scales = 'free')+
scale_y_continuous(labels = function(x) abs(x),
expand = c(0,0.1))+
scale_fill_manual(values=c('cyan','tomato'))+
scale_color_manual(values=c('cyan','tomato'))+
theme_bw()
Which produces this baby:哪个产生了这个婴儿:
Until here everything is fine.直到这里一切都很好。 I would like if it is possible to modify two elements:
我想是否可以修改两个元素:
How can I reduce the vertical space between both facets so that visually there would be only one x-axis (align in the same axis both zeroes and reduce that space).如何减少两个面之间的垂直空间,以便在视觉上只有一个 x 轴(在同一轴上对齐两个零并减少该空间)。
I would like to have the same scale in both y-axis, so the code is designed to have a mirror effect.我想在两个 y 轴上都有相同的比例,所以代码被设计成具有镜像效果。 My issue is that when I set a scale in y-axis like this:
我的问题是,当我像这样在 y 轴上设置比例时:
scale_y_continuous(labels = function(x) abs(x),expand = c(0,0.1),limits = c(NA,800))
Everything changes:一切都变了:
I would like if possible that both y-axis have the same scale starting in 0 to 800 but respecting the magnitude.如果可能的话,我希望两个 y 轴具有相同的比例,从 0 到 800 开始,但尊重幅度。 In this case upper would go from 0 to 800 and down from 0 to -800 but masked according to labels to have the mirror effect.
在这种情况下,go 从 0 到 800 向上,从 0 到 -800 向下,但根据标签进行屏蔽以产生镜像效果。
Many thanks for the help.非常感谢您的帮助。
This looks like an ideal job for the old "invisible dots" trick to set the facet limits where you want them:对于旧的“隐形点”技巧来说,这看起来是一个理想的工作,可以在你想要的地方设置分面限制:
library(ggplot2)
library(dplyr)
df %>%
mutate(Val = ifelse(Group == 'Down', -Val, Val),
Group = factor(Group, levels = c('Up', 'Down'), ordered = TRUE)) %>%
ggplot(aes(Var, Val, color = Group, fill = Group, group = Group)) +
geom_line(size = 1) +
geom_area(alpha = 0.75) +
geom_point(data = data.frame(Group = factor(c("Down", "Up"), c('Up', 'Down')),
Var = c(1, 1),
Val = c(-800, 800)), alpha = 0) +
facet_grid(Group~., scales = 'free') +
scale_y_continuous(labels = function(x) abs(x),
expand = c(0, 0.1)) +
scale_fill_manual(values = c('cyan', 'tomato')) +
scale_color_manual(values = c('cyan', 'tomato')) +
theme_bw() +
theme(panel.spacing = unit(0, "points"))
Though, it's only fair to point out you don't really need facets here and you get a very similar effect by doing:不过,公平地指出您在这里并不真正需要方面,并且您可以通过以下方式获得非常相似的效果:
df %>%
mutate(Val = ifelse(Group == 'Down', -Val, Val),
Group = factor(Group, levels = c('Up', 'Down'), ordered = TRUE)) %>%
ggplot(aes(Var, Val, color = Group, fill = Group, group = Group)) +
geom_line(size = 1) +
geom_area(alpha = 0.75) +
geom_hline(yintercept = 0) +
scale_y_continuous(labels = function(x) abs(x),
expand = c(0, 0.1),
limits = c(-800, 800)) +
scale_fill_manual(values = c('cyan', 'tomato')) +
scale_color_manual(values = c('cyan', 'tomato')) +
theme_bw() +
theme(panel.spacing = unit(0, "points"))
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