Use put two value columns in spread() function in R [duplicate]

Answer 1

Try:

library(dplyr)
library(tidyr)

df %>%
  group_by(id1) %>%
  mutate(id = row_number()) %>%
  gather(key, value, -(id1:info), -id) %>%
  unite(id_key, id, key) %>%
  spread(id_key, value)

Which gives:

#Source: local data frame [2 x 9]

#  id1 id2  info 1_action_comment 1_action_time 2_action_comment 2_action_time 3_action_comment 3_action_time
#1   1   a info1         comment1         time1         comment2         time2         comment3         time3
#2   2   b info2         comment4         time4         comment5         time5               NA            NA