Thanks for your answer!
So the reason why I would like to transform it into a real table is because, in the end, I would like to plot a graph of variables from multiple tibbles.
For instance, I create two tibbles, named tibble1 and tibble2, and I would like to display the sum of both tibbles, which is SKILLSUM_1 and SKILLSUM_2, in one table so that I can plot a graph.
tibble1 <- cps_data %>%
group_by(YEAR, MONTH) %>%
summarise_at(vars(SKILL_1),
list(SKILLSUM_1 = sum))
tibble2 <- cps_data %>%
group_by(YEAR, MONTH) %>%
summarise_at(vars(SKILL_2),
list(SKILLSUM_2 = sum))
If I try then to create a plot with columns of two different tibbles, it won`t work. That's the actual reason why I would like to transform my tibble to a table, which would be one way to solve my problem. Maybe, I should have mentioned that...
The other way would to find a way how to plot variables of multiple tibbles into one graph. I tried it already in the example below, but unfortunately it did not work.. is there even a way?
ggplot(tibble1, tibble2, aes(x=YEAR)) +
geom_line(aes(y = SKILLSUM_1), color = "darkred") +
geom_line(aes(y = SKILLSUM_2), color = "steelblue", linetype="twodash")
Many thanks in advance