如何使用 ggplot2 和 ggpubr 编辑通用图例标题名称？
How can I edit the common legend title name using ggplot2 and ggpubr?
我正在使用 ggpubr 将多个图形合并到一个图中，但似乎无法正确生成一个带有我想要的标题的图形。我希望标题是“定制图例”，因为它是两个图表的共同图例。有人知道我该怎么做吗？
这是我的数据：
data1 = data.frame(var1 = c(1,
1,
1,
1,
2,
2,
2,
2,
3,
3,
3,
3,
4,
4,
4,
4,
5,
5,
5,
5,
6,
6,
6,
6,
7,
7,
7,
7,
8,
8,
8,
8,
9,
9,
9,
9,
10,
10,
10,
10,
11,
11,
11,
11,
12,
12,
12,
12,
13,
13,
13,
13,
14,
14,
14,
14,
15,
15,
15,
15,
16,
16,
16,
16,
17,
17,
17,
17,
18,
18,
18,
18,
19,
19,
19,
19,
20,
20,
20,
20,
21,
21,
21,
21,
22,
22,
22,
22,
23,
23,
23,
23,
24,
24,
24,
24,
25,
25,
25,
25,
26,
26,
26,
26,
27,
27,
27,
27,
28,
28,
28,
28,
29,
29,
29,
29,
30,
30,
30,
30,
31,
31,
31,
31,
32,
32,
32,
32,
33,
33,
33,
33),
var2 = c(1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4),
var3 = c(113,
89,
99,
41,
72,
64,
39,
139,
135,
17,
3,
135,
63,
126,
34,
87,
84,
125,
123,
18,
115,
11,
68,
85,
48,
95,
56,
129,
41,
78,
82,
122,
124,
4,
60,
132,
67,
128,
46,
79,
110,
88,
19,
88,
88,
126,
30,
11,
52,
66,
15,
52,
6,
74,
14,
101,
88,
70,
58,
20,
104,
76,
134,
23,
40,
1,
47,
25,
49,
110,
96,
100,
106,
26,
93,
19,
87,
41,
13,
40,
63,
87,
137,
105,
89,
95,
24,
49,
112,
92,
45,
105,
112,
105,
114,
129,
84,
33,
95,
95,
15,
90,
1,
62,
20,
7,
18,
96,
4,
71,
42,
94,
45,
102,
55,
98,
124,
80,
76,
97,
41,
31,
25,
21,
135,
138,
121,
93,
17,
13,
49,
26))
data2 <- data.frame(var1a = c(1,
1,
1,
1,
2,
2,
2,
2,
3,
3,
3,
3,
4,
4,
4,
4,
5,
5,
5,
5,
6,
6,
6,
6,
7,
7,
7,
7,
8,
8,
8,
8,
9,
9,
9,
9,
10,
10,
10,
10,
11,
11,
11,
11,
12,
12,
12,
12,
13,
13,
13,
13,
14,
14,
14,
14,
15,
15,
15,
15,
16,
16,
16,
16,
17,
17,
17,
17,
18,
18,
18,
18,
19,
19,
19,
19,
20,
20,
20,
20,
21,
21,
21,
21,
22,
22,
22,
22,
23,
23,
23,
23,
24,
24,
24,
24,
25,
25,
25,
25,
26,
26,
26,
26,
27,
27,
27,
27,
28,
28,
28,
28,
29,
29,
29,
29,
30,
30,
30,
30,
31,
31,
31,
31,
32,
32,
32,
32,
33,
33,
33,
33),
var2a = c(1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4),
var3a = c(113,
89,
99,
41,
72,
64,
39,
139,
135,
17,
3,
135,
63,
126,
34,
87,
84,
125,
123,
18,
115,
11,
68,
85,
48,
95,
56,
129,
41,
78,
82,
122,
124,
4,
60,
132,
67,
128,
46,
79,
110,
88,
19,
88,
88,
126,
30,
11,
52,
66,
15,
52,
6,
74,
14,
101,
88,
70,
58,
20,
104,
76,
134,
23,
40,
1,
47,
25,
49,
110,
96,
100,
106,
26,
93,
19,
87,
41,
13,
40,
63,
87,
137,
105,
89,
95,
24,
49,
112,
92,
45,
105,
112,
105,
114,
129,
84,
33,
95,
95,
15,
90,
1,
62,
20,
7,
18,
96,
4,
71,
42,
94,
45,
102,
55,
98,
124,
80,
76,
97,
41,
31,
25,
21,
135,
138,
121,
93,
17,
13,
49,
26))
这是我正在使用的代码：
#Open packages
library(ggplot2)
library(ggpubr)
#Set the theme
theme_set(theme_pubr())
#Change necessary columns to factor
data1$var2 <- factor(data1$var2, levels = c(1,2,3,4))
data2$var2a <- factor(data2$var2a, levels = c(1,2,3,4))
#Generate the plots
#Generate plots
plot1 <- ggplot(data1, aes(x = var1, y = var3, group = var2)) +
geom_line(size = 1.5, aes(linetype = var2, color = var2)) +
xlab('x_label') +
ylab('y_label')+
scale_fill_discrete(name = 'customized legend')
plot2 <- ggplot(data2, aes(x = var1a, y = var3a, group = var2a)) +
geom_line(size = 1.5, aes(linetype = var2a, color = var2a)) +
xlab('x_label') +
ylab('y_label')+
scale_fill_discrete(name = 'customized legend')
#Combine both into one picture
fig <- ggarrange(plot1, plot2,
ncol = 2,
nrow = 1,
common.legend = TRUE,
legend = "bottom")
fig
因为你没有在你的 ggplot 中使用 fill 美学，你不应该使用 scale_fill_discrete。您需要将 linetype 和 color 的图例标题设置为“自定义图例”，因为这些是您使用的美学。
library(ggplot2)
library(ggpubr)
plot1 <- ggplot(data1, aes(x = var1, y = var3, group = var2)) +
geom_line(size = 1.5, aes(linetype = var2, color = var2)) +
xlab('x_label') +
ylab('y_label') +
labs(linetype = "customized legend", color = "customized legend")
plot2 <- ggplot(data2, aes(x = var1a, y = var3a, group = var2a)) +
geom_line(size = 1.5, aes(linetype = var2a, color = var2a)) +
xlab('x_label') +
ylab('y_label') +
labs(linetype = "customized legend", color = "customized legend")
#Combine both into one picture
ggarrange(plot1, plot2,
ncol = 2,
nrow = 1,
common.legend = TRUE,
legend = "bottom")
我正在使用 ggpubr 将多个图形合并到一个图中，但似乎无法正确生成一个带有我想要的标题的图形。我希望标题是“定制图例”，因为它是两个图表的共同图例。有人知道我该怎么做吗？
这是我的数据：
data1 = data.frame(var1 = c(1,
1,
1,
1,
2,
2,
2,
2,
3,
3,
3,
3,
4,
4,
4,
4,
5,
5,
5,
5,
6,
6,
6,
6,
7,
7,
7,
7,
8,
8,
8,
8,
9,
9,
9,
9,
10,
10,
10,
10,
11,
11,
11,
11,
12,
12,
12,
12,
13,
13,
13,
13,
14,
14,
14,
14,
15,
15,
15,
15,
16,
16,
16,
16,
17,
17,
17,
17,
18,
18,
18,
18,
19,
19,
19,
19,
20,
20,
20,
20,
21,
21,
21,
21,
22,
22,
22,
22,
23,
23,
23,
23,
24,
24,
24,
24,
25,
25,
25,
25,
26,
26,
26,
26,
27,
27,
27,
27,
28,
28,
28,
28,
29,
29,
29,
29,
30,
30,
30,
30,
31,
31,
31,
31,
32,
32,
32,
32,
33,
33,
33,
33),
var2 = c(1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4),
var3 = c(113,
89,
99,
41,
72,
64,
39,
139,
135,
17,
3,
135,
63,
126,
34,
87,
84,
125,
123,
18,
115,
11,
68,
85,
48,
95,
56,
129,
41,
78,
82,
122,
124,
4,
60,
132,
67,
128,
46,
79,
110,
88,
19,
88,
88,
126,
30,
11,
52,
66,
15,
52,
6,
74,
14,
101,
88,
70,
58,
20,
104,
76,
134,
23,
40,
1,
47,
25,
49,
110,
96,
100,
106,
26,
93,
19,
87,
41,
13,
40,
63,
87,
137,
105,
89,
95,
24,
49,
112,
92,
45,
105,
112,
105,
114,
129,
84,
33,
95,
95,
15,
90,
1,
62,
20,
7,
18,
96,
4,
71,
42,
94,
45,
102,
55,
98,
124,
80,
76,
97,
41,
31,
25,
21,
135,
138,
121,
93,
17,
13,
49,
26))
data2 <- data.frame(var1a = c(1,
1,
1,
1,
2,
2,
2,
2,
3,
3,
3,
3,
4,
4,
4,
4,
5,
5,
5,
5,
6,
6,
6,
6,
7,
7,
7,
7,
8,
8,
8,
8,
9,
9,
9,
9,
10,
10,
10,
10,
11,
11,
11,
11,
12,
12,
12,
12,
13,
13,
13,
13,
14,
14,
14,
14,
15,
15,
15,
15,
16,
16,
16,
16,
17,
17,
17,
17,
18,
18,
18,
18,
19,
19,
19,
19,
20,
20,
20,
20,
21,
21,
21,
21,
22,
22,
22,
22,
23,
23,
23,
23,
24,
24,
24,
24,
25,
25,
25,
25,
26,
26,
26,
26,
27,
27,
27,
27,
28,
28,
28,
28,
29,
29,
29,
29,
30,
30,
30,
30,
31,
31,
31,
31,
32,
32,
32,
32,
33,
33,
33,
33),
var2a = c(1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4,
1,
2,
3,
4),
var3a = c(113,
89,
99,
41,
72,
64,
39,
139,
135,
17,
3,
135,
63,
126,
34,
87,
84,
125,
123,
18,
115,
11,
68,
85,
48,
95,
56,
129,
41,
78,
82,
122,
124,
4,
60,
132,
67,
128,
46,
79,
110,
88,
19,
88,
88,
126,
30,
11,
52,
66,
15,
52,
6,
74,
14,
101,
88,
70,
58,
20,
104,
76,
134,
23,
40,
1,
47,
25,
49,
110,
96,
100,
106,
26,
93,
19,
87,
41,
13,
40,
63,
87,
137,
105,
89,
95,
24,
49,
112,
92,
45,
105,
112,
105,
114,
129,
84,
33,
95,
95,
15,
90,
1,
62,
20,
7,
18,
96,
4,
71,
42,
94,
45,
102,
55,
98,
124,
80,
76,
97,
41,
31,
25,
21,
135,
138,
121,
93,
17,
13,
49,
26))
这是我正在使用的代码：
#Open packages
library(ggplot2)
library(ggpubr)
#Set the theme
theme_set(theme_pubr())
#Change necessary columns to factor
data1$var2 <- factor(data1$var2, levels = c(1,2,3,4))
data2$var2a <- factor(data2$var2a, levels = c(1,2,3,4))
#Generate the plots
#Generate plots
plot1 <- ggplot(data1, aes(x = var1, y = var3, group = var2)) +
geom_line(size = 1.5, aes(linetype = var2, color = var2)) +
xlab('x_label') +
ylab('y_label')+
scale_fill_discrete(name = 'customized legend')
plot2 <- ggplot(data2, aes(x = var1a, y = var3a, group = var2a)) +
geom_line(size = 1.5, aes(linetype = var2a, color = var2a)) +
xlab('x_label') +
ylab('y_label')+
scale_fill_discrete(name = 'customized legend')
#Combine both into one picture
fig <- ggarrange(plot1, plot2,
ncol = 2,
nrow = 1,
common.legend = TRUE,
legend = "bottom")
fig
因为你没有在你的 ggplot 中使用 fill 美学，你不应该使用 scale_fill_discrete。您需要将 linetype 和 color 的图例标题设置为“自定义图例”，因为这些是您使用的美学。
library(ggplot2)
library(ggpubr)
plot1 <- ggplot(data1, aes(x = var1, y = var3, group = var2)) +
geom_line(size = 1.5, aes(linetype = var2, color = var2)) +
xlab('x_label') +
ylab('y_label') +
labs(linetype = "customized legend", color = "customized legend")
plot2 <- ggplot(data2, aes(x = var1a, y = var3a, group = var2a)) +
geom_line(size = 1.5, aes(linetype = var2a, color = var2a)) +
xlab('x_label') +
ylab('y_label') +
labs(linetype = "customized legend", color = "customized legend")
#Combine both into one picture
ggarrange(plot1, plot2,
ncol = 2,
nrow = 1,
common.legend = TRUE,
legend = "bottom")
