Merge Records Over Time Interval

Question

Let me begin by saying this question pertains to R (stat programming language) but I\'m open straightforward suggestions for other environments.

The goal is to mer

Answer 1

here is an example:

# first, merge by ID
z <- merge(A[, -1], B, by = "ID")

# convert string to POSIX time
z <- transform(z,
  s_t = as.numeric(strptime(as.character(z$StartTime), "%H:%M:%S")),
  dur = as.numeric(strptime(as.character(z$Duration), "%H:%M:%S")) - 
    as.numeric(strptime("00:00:00", "%H:%M:%S")),
  tim = as.numeric(strptime(as.character(z$Time), "%H:%M:%S")))

# subset by time range
subset(z, s_t < tim & tim < s_t + dur)

the output:

  ID StartTime Duration Outcome OBS     Time        s_t dur        tim
1  1  10:12:06 00:00:10  Normal   1 10:12:10 1321665126  10 1321665130
2  1  10:12:06 00:00:10  Normal   2 10:12:15 1321665126  10 1321665135
7  2  10:12:30 00:00:30   Weird   3 10:12:45 1321665150  30 1321665165

OBS #2 looks to be in the range. does it make sense?