Question

使用ggplot2 R软件包我创建了一个带有6条彩色线条的线条图（指的是6个级别的因子），我想用黑色和白色来改变它，制作3条BLACK实线，虚线和虚线以及3条灰色实线，虚线和虚线。我尝试使用scale_linetype_manual（）和scale_color_grey（），但我无法混合灰色和黑色虚线。

这里是灰度选项的代码：

ggplot() + 
  geom_line(data = f[!is.na(f$fr),], aes(x=date2, y=fr, colour=locality, group=locality), 
            size = 1.0) + 
  scale_color_grey(start = 0, end = 0.9, guide="legend", name="Locality", 
                   labels=c("a","b","c","d","e","f")) + 
  xlab("") + 
  ylab("") + 
  theme_bw() +
  theme(legend.position = "top", panel.background = element_rect(fill = "white"), 
        panel.grid.major = element_line(colour = "white"), 
        axis.text.x=element_text(angle=90,hjust=1,vjust=0.5)) + 
  facet_grid(.~year)

虽然这是带虚线的代码：

ggplot() + 
  geom_line(data = f[!is.na(f$fr),], aes(x=date2, y=fr, linetype=locality, group=locality), 
            size = 1.0) + 
  scale_linetype_manual(name="Locality", 
                        values=c("solid", "dashed", "dotted", "dotdash", "longdash", "twodash"), 
                        labels=c("a","b","c","d","e","f")) +
  xlab("") + 
  ylab("") + 
  theme_bw()+ 
  theme(legend.position = "top", panel.background = element_rect(fill = "white"), 
        panel.grid.major = element_line(colour = "white"), 
        axis.text.x=element_text(angle=90,hjust=1,vjust=0.5)) +
  facet_grid(.~year)

所以..有人可以帮我用一条黑色实线，一条黑色虚线，一条黑色虚线，一条灰色实线等创建相同的情节？

Answer 1

映射到colour和linetype，并设置手动缩放。

d <- data.frame(locality = rep(letters[1:6], each = 2),
            x = 1:2,
            y = rep(1:6, each = 2))

ggplot(d, aes(x = x, y = y,colour = locality, linetype = locality)) + 
  geom_line() +
  theme_bw() +
  scale_color_manual(name = "Locality",
                     values = c('black', 'black', 'black', 'grey', 'grey', 'grey'),
                     labels = c("a","b","c","d","e","f")) +
  scale_linetype_manual(name = "Locality", 
                        values = c("solid", "dashed", "dotted", "solid", "dashed", "dotted"), 
                        labels = c("a","b","c","d","e","f"))

Answer 2

正如MLavoie所说，我认为你应该尝试创建明确的向量。我无法尝试，但也许这样的事情应该有效：

vectCol=c("a"="black", "b"="black", "c"="black", "d"="grey","e"="grey", "f"="grey")
vectTyp=c("a"="solid", "b"="dashed", "c"="dotted", "d"="solid","e"="dashed", "f"="dotted")

然后，在ggplot中添加“linetype”作为参数，并使用scale_manual作为颜色和线型

ggplot(data = f[!is.na(f$fr),], aes(x=date2, y=fr, colour=locality,group=locality, linetype=locality)) + 
geom_line(size = 1.0) + 
scale_color_manual(values=vectCol, guide="legend", name="Locality", labels=c("a","b","c","d","e","f"))+ 
scale_linetype_manual(values=vectTyp, guide="legend", name="Locality", labels=c("a","b","c","d","e","f"))+
xlab("") + ylab("") + theme_bw() + 
theme(legend.position = "top", panel.background = element_rect(fill ="white"), panel.grid.major = element_line(colour = "white"), 
    axis.text.x=element_text(angle=90,hjust=1,vjust=0.5)) + facet_grid(.~year)

线条图用灰色和黑色虚线

2 个答案: