重新排序数据框中的因子级别

Question

我有一个data.frame,如下所示:

task    measure
right   m1
left    m2
up      m3
down    m4
front   m5
back    m6
.
.
.

任务栏仅采用六个不同的值,这些值被视为因子,并按R排序为:"后退","下","前","左","右","上".

但是,我需要将它们命名为:"向上","向下","向左","向右","向前","向后".因此,当我在ggplot中使用此数据时,相关任务(例如"向上"和"向下")彼此相邻绘制.

如何改变因子"任务"级别的顺序？

Answer 1

假设您的数据帧是mydf:

mydf$task <- factor(mydf$task, levels = c("up", "down", "left", "right", "front", "back"))