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ggplot2颜色显示为灰色而不是颜色

[英]ggplot2 colour appears in grey and not with colour

so i have this data eight_gen_scatter: 所以我有这个数据four_gen_scatter:

pro = c("CONCOCT", "MetaBAT", "MaxBin", "MyCC")
MEGAHIT = c(3, 3, 3, 3)
RayMeta = c(3, 2, 1, 4)
SPAdes = c(3, 3, 2, 3)
Velvet = c(3, 3, 0, 2)

and i have the following code: 我有以下代码:

ggplot(eight_gen_scatter_melted,aes(x=variable, y=value, color=Programas)) + 
  geom_bar(stat="identity",position="dodge") +
  scale_fill_discrete(name="variable", breaks=c(1, 2, 3, 4), 
                      labels=c("CONCOCT", "MaxBin", "MetaBAT", "MyCC")) + 
  scale_y_continuous(limits = c(0, 8)) 

在此处输入图片说明

But somehow the bars are with colour grey and just the border is with different colors, how do i fill up the bars with the colours. 但是不知何故,条形为灰色,只是边框具有不同的颜色,我该如何用颜色填充条形。

I'll be very grateful if you could give some help. 如果您能提供帮助,我将不胜感激。

THis code below works perfectly for me. 下面的代码非常适合我。 I don't understand why did you add "scale_fill_discrete()"? 我不明白为什么要添加“ scale_fill_discrete()”? Do you want to change the order of items in the legend? 您是否要更改图例中的项目顺序?

The legend will be added automatically since you set "fill= Programas". 自设置“ fill = Programas”以来,图例将自动添加。 So you don't need extra code. 因此,您不需要额外的代码。

ggplot(df, aes(x = variable, y = value, fill= Programas)) + geom_bar(stat = "identity", position = "dodge")

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