Question

我希望使用geom_point为Merge2.m$variable中的点制作颜色。我该怎么做呢？请参阅下面的示例（不起作用）：

ggplot(Merge2.m, aes(x=revDown, y=Term2, color=variable))+ 
  theme_bw(12) +
  geom_point(aes(color=factor(variable)), size=7, colour="black") +
  labs(title="KEGG (Targets for up-regulated miRNAs)", y="KEGG", x="log2 inverted Pvalue")


> head(Merge2.m)
                                    Term variable        value   revDown                                  Term2
1                 Acute myeloid leukemia PValDown 3.490840e-05 14.806066                 Acute myeloid leukemia
2                      Adherens junction PValDown 1.205063e-02  6.374748                      Adherens junction
3 Bacterial invasion of epithelial cells PValDown 2.016157e-05 15.598032 Bacterial invasion of epithelial cells
4            Chemokine signaling pathway PValDown 1.101506e-02  6.504379            Chemokine signaling pathway
5               Chronic myeloid leukemia PValDown 3.964774e-06 17.944330               Chronic myeloid leukemia
6              Circadian rhythm - mammal PValDown 1.672252e-02  5.902064              Circadian rhythm - mammal

Answer 1

删除colour = "black"。您甚至可以简单地使用geom_point()而不使用任何参数，因为您已经声明了所需的映射。

这是你做的：

ggplot(mtcars, aes(mpg, cyl, color = factor(cyl))) + geom_point(color = "black")

以下是需要做的事情：

ggplot(mtcars, aes(mpg, cyl, color = factor(cyl))) + geom_point()

颜色到geom_points变量

1 个答案: