Preprocessing start-time and end-time bug

[auzaheta]

Describe the bug
The initialization of the stats matrices doesn't consider the start time argument.
This issue related to #33

To Reproduce

# direct network
eventsIncrement <- data.frame(
  time = cumsum(
    c(1, 5, 3, 4, 2, 1, 3, 4, 5, 1, 3, 4)),
  sender = sprintf("Actor %d",
    c(1, 3, 2, 2, 5, 1, 3, 3, 4, 2, 5, 1)),
  receiver = sprintf("Actor %d",
    c(2, 2, 3, 3, 1, 5, 4, 4, 2, 3, 2, 2)),
  increment =
    c(1, 2, 1, 1, 1, 2, 1, 1, 1, 1, 1, 1),
  stringsAsFactors = FALSE
)

actorsEx <- data.frame(
  label = sprintf("Actor %d", 1:5),
  present = rep(TRUE, 5),
  attr1 = c(9.9, 0.1, 0.5, 0.45, 0.25),
  stringsAsFactors = FALSE
)

networkState <- matrix(
  c(0, 3, 0, 0, 0,
    1, 0, 1, 1, 0,
    0, 0, 0, 1, 0,
    0, 0, 1, 0, 0,
    0, 0, 0, 0, 0),
  nrow = 5, ncol = 5, byrow = TRUE,
  dimnames = list(sprintf("Actor %d", 1:5),
                  sprintf("Actor %d", 1:5))
)

# defining objects
networkState <- defineNetwork(
  matrix = networkState, nodes = actorsEx,
  directed = TRUE)
networkState <- linkEvents(
  x = networkState,
  changeEvent = eventsIncrement,
  nodes = actorsEx)
depNetwork <- defineDependentEvents(
  events = eventsIncrement,
  nodes = actorsEx,
  defaultNetwork = networkState)

prep <- estimate(depNetwork ~ inertia(networkState, window = 5,
                            preprocessOnly = TRUE,
                             estimationInit = list(startTime = 7))
prep$initialStats

Expected behavior

It should be an empty matrix

Desktop (please complete the following information):

• OS: Windows 10 Education
• R Version 4.0.3
• Goldfish Version 1.5.0

[auzaheta]

Other bugs for end-time were found.
For DyNAM-rate events with interval 0 are produced for the preprocessing when start-time is not specified.
An additional review of the estimation engine is required to understand how this information is used.

[auzaheta]

Additional tests using windows for DyNAM-rate are needed.