我正在使用它在for循环中将图形打印到PDF,这很好用:
print(ggplot(subdata3, aes(x = Year, y = value, colour = Stat))
+ geom_line() + expand_limits(y=c(0,100))
+ ggtitle(paste0(as.character(ScenName),":\n", as.character(k)))
+ ylab(paste0(j, " (", units, ")")))
现在,我需要将每个ggplot分配给一个变量’p’,然后将其存储在一个列表中,并由multiplot用于在页面上排列多个图.
这是我尝试将绘图分配给变量:
p <- ggplot(subdata3, aes(x = Year, y = value, colour = Stat))
+ geom_line() + expand_limits(y=c(0,100))
+ ggtitle(paste0(as.character(ScenName),":\n", as.character(k)))
+ ylab(paste0(j, " (", units, ")"))
我做的唯一更改是删除print()并进行变量赋值.之后,我收到此错误:
Error in +ggtitle(paste0(as.character(ScenName), ":\n", as.character(k))) :
invalid argument to unary operator
我已尝试对各种()组进行多次调整以尝试找到解决方案,但是,似乎没有任何效果.
有什么想法吗?
最佳答案 你有错误的地方.试试这个:
p <- ggplot(subdata3, aes(x = Year, y = value, colour = Stat)) +
geom_line() + expand_limits(y=c(0,100)) +
ggtitle(paste0(as.character(ScenName),":\n", as.character(k))) +
ylab(paste0(j, " (", units, ")"))