t1 = c("dog"="dog","cat"= "cat")
t1

Results:
     dog   cat
    "dog" "cat"

t = data.frame(animal = "dog","cat")
c(t$animal =t$animal)  # this does not work

setNames(t$animal, t$animal)

#dog cat
#dog cat

t = data.frame(animal = c("dog","cat"))