R - repetition with dplyr -


in order transform "long compact" format data wide format need use rep function.

i can not figure out how integrate dplyr flow.

this repetition need use 

dta1 = as.data.frame(cbind(rep(dta$id, dta$duration), rep(dta$act, dta$duration) ) )  colnames(dta1) <- c('id', 'act')

here dplyr code. 

dta1 %>% group_by(id) %>%  mutate( time = 1:n() ) %>% spread(time, act)

do have idea how put these 2 codes ?

the data 

dta = structure(list(id = c("b10001n1", "b10001n1", "b10001n1", "b10001n1",                    "b10001n1", "b10001n1", "b10001n1", "b10001n1", "b10001n1", "b10001n1",                    "b10001n1", "b10001n1", "b10001n1", "b10001n1", "b10001n1", "b10001n1",                    "b10001n2", "b10001n2", "b10001n2", "b10001n2", "b10001n2", "b10001n2",                    "b10001n2", "b10001n2", "b10001n2", "b10001n2", "b10001n2", "b10001n2",                    "b10001n2", "b10001n3", "b10001n3", "b10001n3", "b10001n3", "b10001n3",                    "b10001n3", "b10001n3", "b10001n3", "b10001n3", "b10001n3", "b10001n3",                    "b10001n3", "b10001n3", "b10001n4", "b10001n4", "b10001n4", "b10001n4",                    "b10001n4", "b10001n4", "b10001n4", "b10001n4", "b10001n4", "b10001n4",                    "b10001n4", "b10001n4", "b10001n4"), act = c("-11", "1704", "1302",                                                                 "1301", "1507", "603", "1301", "101", "502", "1704", "1507",                                                                 "1404", "8888", "603", "1507", "101", "-11", "1302", "1301",                                                                 "1507", "704", "101", "1704", "1704", "3102", "1002", "1704",                                                                 "3101", "101", "-11", "1704", "1302", "1302", "1507", "603",                                                                 "2902", "3201", "812", "1704", "1704", "3701", "101", "-11",                                                                 "1302", "1301", "3101", "1001", "1507", "1006", "2101", "2902",                                                                 "1704", "8888", "1704", "1302"), duration = c(30, 570, 5, 30,                                                                                                               25, 3, 12, 165, 30, 10, 5, 20, 70, 45, 180, 240, 570, 30, 30,                                                                                                               20, 25, 95, 70, 20, 20, 20, 60, 45, 435, 30, 30, 570, 90, 30,                                                                                                               15, 5, 40, 60, 240, 60, 30, 240, 600, 15, 45, 15, 75, 30, 150,                                                                                                               60, 30, 60, 210, 60, 90)), row.names = c(na, 55l), class = "data.frame", .names = c("id",                                                                                                                                                                                                   "act", "duration"))

try 

library(dplyr) library(tidyr) dta[rep(1:nrow(dta), dta$duration), -3] %>%   group_by(id) %>%    mutate( time = 1:n() ) %>%   spread(time, act)

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