如果重叠，如何按组更有效地绘制 ggplot2 中的点？

Question

So, I would like to plot points using ggplot separated by groups, but because they overlap the colour by group function doesn't seem so effective visually, I already set the alpha to 0.3. What else could I do?

Answer 1

I am assuming that you have something like the following:

df <- data.frame(x = c((1:10)-0.05, 1:10, 1:10), y = c(1:10, 1:20), group = paste('Group', 1:10))
df$group <- factor(df$group, levels = unique(df$group))
ggplot(df, aes(x, y, colour = group), alpha=0.3)+
  geom_point()

So, as suggested by @Duck you can plot the points in separate plots using facet_wrap as in the following:

df <- data.frame(x = c((1:10)-0.05, 1:10, 1:10), y = c(1:10, 1:20), group = paste('Group', 1:10))
df$group <- factor(df$group, levels = unique(df$group))
ggplot(df, aes(x, y))+
  geom_point()+
  facet_wrap(~group)