小编Ele*_*ena的帖子

使用ggplot2 R软件包,我创建了一条带有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条黑色实线,虚线和虚线以及3个灰色实体,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scale灰色选项的代码:

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)    

虽然这是带有虚线的代码:

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 …