How to group a vector into a list of vectors?

Question

I have some data which looks like this (fake data for example\'s sake):

dressId        color 
6              yellow 
9              red
10             green         


        

Answer 1

I am afraid that the answer should be a little different, you should use the following code to accomplish the requested behaviour

df %>%
group_by(dressId) %>%
summarize(colors = toString(unique(color)))