How we can assign superscript and subscript in R. for example
marklist<- c(98,74,32,58,64,98,85,51)
names<- c("A","B","C","D","E","F","G","H")
grade<-data.frame(marklist,names)
library(tidyverse)
grade <- grade %>% mutate(grade= if_else(marklist>=90, "A",
if_else(marklist>=85, "B+",if_else(marklist>=75, "C",
if_else(marklist>=50, "D","F")))))
print(grade)
grade
marklist names grade
1 98 A A
2 74 B D
3 32 C F
4 58 D D
5 64 E D
6 98 F A
7 85 G B+
8 51 H D
my question is how I can write B plus superscript as a character " B +" plus sign should be superscript.