Hi R User.
I have a date set in which I wanted to find the duration (period) between
released time and detection time for each individual. Is there any simplest
way to create a matrix?
I appreciate your help.
Thanks,
MW
--------------
Here is the example data,
dAT<-structure(list(Id = structure(c(1L, 2L, 3L, 4L, 1L, 2L, 5L, 4L,
1L, 6L, 6L, 3L, 4L, 1L), .Label = c("a", "b", "c", "e", "f",
"m"), class = "factor"), date = structure(c(1L, 1L, 1L, 5L, 4L,
1L, 5L, 5L, 3L, 1L, 2L, 7L, 6L, 8L), .Label = c("1-Jan-18", "1-Jul-18",
"10-Mar-18", "15-Jan-18", "2-Jan-18", "27-Jan-18", "3-Jan-18",
"7-Mar-19"), class = "factor")), .Names = c("Id", "date"), class =
"data.frame", row.names = c(NA,
-14L))
#and the results looks like
Result<-structure(list(Id = structure(1:6, .Label = c("a", "b", "c",
"e", "f", "m"), class = "factor"), intial.released.date = structure(c(1L,
1L, 1L, 2L, 2L, 1L), .Label = c("1-Jan-18", "2-Jan-18"), class = "factor"),
duration.between.t2.and.t1 = c(14L, 0L, 2L, 0L, NA, 181L),
duration.between.t3.and.t1 = c(68L, NA, NA, 25L, NA, NA),
duration.between.t4.and.t1 = c(430L, NA, NA, NA, NA, NA),
duration.between.t3.and.t2 = c(54L, NA, NA, NA, NA, NA),
duration.between.t4.and.t2 = c(416L, NA, NA, NA, NA, NA)), .Names = c(
"Id",
"intial.released.date", "duration.between.t2.and.t1",
"duration.between.t3.and.t1",
"duration.between.t4.and.t1", "duration.between.t3.and.t2",
"duration.between.t4.and.t2"
), class = "data.frame", row.names = c(NA, -6L))
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