How do I transpose a tibble() in R

Solution here: https://stackoverflow.com/a/28917212/3880322

library(dplyr)
library(tidyr)
df %>%
    gather(key = var_name, value = value, 2:ncol(df)) %>% 
    spread_(key = names(df)[1],value = 'value')

As Sotos has mentioned it, you just need to re-declare your matrix as a tibble:

as_tibble(cbind(nms = names(df), t(df)))