R ggplot2 commonly used functions in post modification

1. 更改x轴分类标签的名称

scale_x_discrete(labels=c('A', 'B'))

2. 更改x轴分类标签的顺序

#方法1，在x轴映射里面改因子数据的层次
factor(team, level=c('Mavs', 'Heat', 'Nets', 'Lakers')
#方法2，
scale_x_discrete(limit = c('a', 'd', 'c','b', 'f', 'e'))

ref:r - How do you specifically order ggplot2 x axis instead of alphabetical order? - Stack Overflow

3. 更改facet分面标签文本及顺序

facet_grid(~factor(team, levels=c('C', 'D', 'A', 'B'))，## 更改标签顺序
  labeller = as_labeller(c(A='new1', B='new2', C='new3', D='new4'))) ## 更改标签内容

3. 更改legend的标签文本及顺序

### 更改图例标题文本
+ labs(fill = "xxxx") 

###翻转图例顺序
# Use guides function to reverse legend for 
# a specific aesthetic (fill, linetype, shape or color)
p + guides(fill = guide_legend(reverse=TRUE))

# Or use scale_fill_discrete (same as above)
p + scale_fill_discrete(guide = guide_legend(reverse=TRUE))

### 自定义图例子标签顺序
# Change the order of legend items
p + scale_x_discrete(limits=c("B", "C", "A"))

### 更改图例标题和子标签文本
# Edit legend title and labels
p + scale_fill_discrete(name = "legend name", labels = c("A", "B", "C"))
## 或者
scale_fill_manual(
values = c("#7ecaa5", "#feb769"), ## 改颜色
name = NULL, ## 改名字
labels = c("Baseline\n(No-weighted)", "KE-weighted") ## 改子标签名字
)

4. 更改y轴的位置，

scale_y_continuous(position = "right")

5. 坐标轴数值转百分比

labels = scales::percent