如何反转图例(标签和颜色)，使高价值从底部开始? [英] How to reverse legend (labels and color) so high value starts at bottom?

问题描述

颠倒图例标签顺序的最佳方法是什么，以使7朝下而1朝上?

whats the best way to invert the legend label order so the 7 is down and the 1 is upstairs?

df$day <- as.numeric(df3$day)
blues <- colorRampPalette(c('#132B43', '#56B1F7'))

p4 <- 
    ggplot(subset(df,feedback==1&stp>20), aes(x=correct, fill=day, colour=day)) +
    geom_histogram(colour="black", binwidth=10) +
    facet_grid(day ~ .) +
    ggtitle("Over-pronation histogram") +
    ylab("Count (150s period)") +
    xlab("% Steps in over-pronation") +guide_legend(reverse = false)

推荐答案

您的代码很奇怪，用 false 代替了 FALSE ，并且错误地放置了 guide_legend .正确的用法是(@Harpal对此提供了提示):

Your code is quite strange, with false instead of FALSE and incorrectly placed guide_legend. The correct usage is (@Harpal gives a hint on that):

ggplot(data.frame(x=1:4, y=4:1, col=factor(1:4)), aes(x=x, y=y, col=col)) + 
  geom_point(size=10)
ggplot(data.frame(x=1:4, y=4:1, col=factor(1:4)), aes(x=x, y=y, col=col)) + 
  geom_point(size=10) + guides(colour = guide_legend(reverse=T))

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