我试图将ggplot2图表的y轴标题旋转并居中在y轴上。我已经成功地旋转了标题,但是即使我使用hjust = 0.5
命令,似乎无法将其居中于y轴上。有没有办法在将标题旋转后将其居中于y轴上?
dataset <- data.frame(cultivar = c('var1',
'var1',
'var1',
'var1',
'var3',
'var3',
'var3',
'var3',
'var2',
'var2',
'var2',
'var2',
'var3',
'var3',
'var1',
'var2',
'var2',
'var2',
'var1',
'var2',
'var3',
'var3',
'var1',
'var1',
'var1',
'var3',
'var3',
'var1',
'var2',
'var2',
'var2',
'var2',
'var3',
'var1',
'var3',
'var1'),
rate = c(10,
20,
30,
40,
10,
20,
30,
40,
10,
20,
30,
40,
20,
40,
10,
10,
30,
20,
30,
40,
10,
30,
40,
20,
20,
10,
30,
30,
40,
10,
30,
20,
40,
10,
20,
40),
vi = c(1354,
1307,
1529,
1380,
1416,
1342,
1419,
1363,
1282,
1287,
1202,
1312,
1294,
1248,
1431,
1421,
1287,
1439,
1405,
1406,
1395,
1540,
1222,
1247,
1375,
1235,
1436,
1335,
1478,
1356,
1542,
1219,
1392,
1406,
1524,
1342))
生成图表的代码:
#Aggregate data frame
datasetMean <- aggregate.data.frame(dataset, by=list(dataset$cultivar, dataset$rate), mean)
datasetMean <- select(datasetMean, Group.1, Group.2, vi)
colnames(datasetMean) <- c("cultivar","rate","vi")
#Generate graph
ggplot(datasetMean, aes(x = cultivar, y = vi, fill=factor(rate)))+
geom_bar(stat="identity", width = 0.6, position = "dodge", col = "black")+
scale_fill_discrete(name = "Rate", labels = c("0X","1X","4X","8X"))+
xlab("Cultivar") + ylab("vi")+
ggtitle("VI Scores")+
theme(plot.title = element_text(hjust = 0.5, size = 30),
strip.text.x = element_text(size = 25),
axis.text = element_text(size = 20),
axis.title = element_text(size = 25),
legend.key.size = unit(1.5, "cm"),
legend.text = element_text(size = 15),
legend.title = element_text(size = 20),
axis.title.y = element_text(angle = 0, hjust = 0.5))
axis.title.y
规范中尝试使用vjust = .5
。(vjust
用于垂直对齐,hjust
用于水平对齐。) - ravic_