geom_ribbon 不同颜色 - R

Question

geom_ribbon 不同颜色 - R

3

我正在使用下面的代码绘制我的数据，但我无法正确设置geom_ribbon的颜色。

我的图表包含4条线，每条线都有不同的颜色。我希望每条线的'geom_ribbon'具有与其线相同的颜色（透明度-alpha）。

此外，当我更改alpha的值（例如从0.1到0.9），我看不到透明度的任何变化。最后，在图例中添加了一个额外的类别，我想删除它？在这个基本的ggplot上有什么帮助吗？

ggplot(dfmean_forplot, aes(x = image, y = value, group = ID)) + 
  geom_line(aes(colour=factor(ID)))+ 
  scale_x_discrete(breaks=1:21,
  labels=c("19/1","7/2","17/2","18/3","17/4","27/4","17/5","27/5","7/6","16/6","26/6","5/7","16/7","6/8","15/8","25/8","4/9","25/9","4/10","14/10","22/11"))+ 
  xlab("# reference")+
  ylab("value")+
  scale_colour_discrete(name = "class")+
  ylim(0,0.9)+
  geom_ribbon(aes(ymin=dfmean_forplot$value-dfsd_forplot$value, ymax=dfmean_forplot$value+dfsd_forplot$value, alpha = 0.3))

编辑

图例怎么样？理想情况下，我希望将它们组合在一起，以便每个颜色都有一个正方形，被同色线条穿过。

- GCGM

2

给两个尺度取相同的名称，并将它们连接在一起。 - undefined

完全正确！非常感谢 - undefined

1个回答

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- markus · Accepted Answer

您需要为geom_ribbon添加fill美学并将alpha移出aes。以下代码应该解决这个问题。

ggplot(dfmean_forplot, aes(x = image, y = value, group = ID)) + 
 geom_line(aes(colour=factor(ID)))+ 
 scale_x_discrete(breaks=1:21,
                  labels=c("19/1","7/2","17/2","18/3","17/4","27/4","17/5","27/5","7/6","16/6","26/6","5/7","16/7","6/8","15/8","25/8","4/9","25/9","4/10","14/10","22/11"))+
 xlab("# reference")+
 ylab("value")+
 scale_colour_discrete(name = "class")+
 ylim(0,0.9)+
 geom_ribbon(aes(ymin=dfmean_forplot$value-dfsd_forplot$value, 
                 ymax=dfmean_forplot$value+dfsd_forplot$value,
                 fill = factor(ID)), alpha = 0.3)