如何使用刻面为ggplot2中的轴仅设置一个限制? [英] How to set just one limit for axes in ggplot2 with facets?

问题描述

这个问题与此类似:(v0.3.0)创建于2020-04-30 sup>

通过扩展删除边距.也可以单面.对于连续轴，右边距设置为默认的倍数展开倍数0.05.

  ggplot(vegLengths，aes(length，fill = veg))+geom_density(alpha = 0.2)+scale_x_continuous(expand =扩展(mult = c(0，0.05)))+coord_cartesian(xlim = c(0，NA)) 

This question is similar to this one: How to set limits for axes in ggplot2 R plots?, with the difference that I want to limit one side only (e.g. plot only for x>0 instead of -5000 < x < 5000 ) and do it with facets.

Note, I'd like to know solutions for both of these simple cases:

1. scale_x_continuous(limits = c(-5000, 5000)) ( the same asxlim(-5000, 5000)) - it removes points entirely from consideration (e.g. they will not be used for geom_smooth())

2. coord_cartesian(xlim = c(-5000, 5000)) functions - it simply does not plot them (but still uses for geom_smooth())

This situation happens often when you use facet_wrap(~veg, scales = "free_x) and don't know what the upper x limit for each facet, but you know that they are always positive.

解决方案

Set limits one-sided with NA. Works both in coord_ and scale_ functions

I generally prefer coord_ because it does not remove data. For the example below you would additionally need to remove the margin at 0, e.g. with expand.

library(ggplot2)    

carrots <- data.frame(length = rnorm(500000, 10000, 10000))
cukes <- data.frame(length = rnorm(50000, 10000, 20000))
carrots$veg <- 'carrot'
cukes$veg <- 'cuke'
vegLengths <- rbind(carrots, cukes)

ggplot(vegLengths, aes(length, fill = veg)) +
  geom_density(alpha = 0.2) +
  scale_x_continuous(limits = c(0, NA))
#> Warning: Removed 94542 rows containing non-finite values (stat_density).

ggplot(vegLengths, aes(length, fill = veg)) +
  geom_density(alpha = 0.2) +
  coord_cartesian(xlim = c(0, NA))

^{Created on 2020-04-30 by the reprex package (v0.3.0)}

remove the margin with expand. Also one sided possible. the right margin is set to the default mult expansion of 0.05 for continous axis.

ggplot(vegLengths, aes(length, fill = veg)) +
  geom_density(alpha = 0.2) +
  scale_x_continuous(expand = expansion(mult = c(0, 0.05))) +
  coord_cartesian(xlim = c(0, NA))

这篇关于如何使用刻面为ggplot2中的轴仅设置一个限制?的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！