#
# Print time difference between adjacent records in log file.
# Compute and print mean time difference.
#

BEGIN {
}

NF == 0 {
  # Blank line
  next 
}
 
/\[/ {
  startData = 1
  next
}

/\]/ {
  # All done
  exit 0
}

{
  if (startData) {

    if (nrec) {
      delta = $1 - lastTime
      printf("%d %.4f\n", nrec, delta)
      meanDelta += delta
      nDelta++
    }

    lastTime = $1
    nrec++
  }
}


END {
  printf("Mean delta: %.4f\n", meanDelta / nDelta)
}