simmer (version 3.1.1)

create_trajectory: Create a trajectory

Description

This function initialises a trajectory, which is a chain of activities followed by arrivals of the same type.

Usage

create_trajectory(name = "anonymous")

Arguments

name

the name of the trajectory.

Value

Returns an environment that represents the trajectory.

See Also

Other methods to deal with trajectories: get_head, get_tail, get_n_activities, seize, release, timeout, set_attribute, branch, rollback.

Examples

# NOT RUN {
t0 <- create_trajectory("my trajectory") %>%
  ## add an intake activity
  seize("nurse", 1) %>%
  timeout(function() rnorm(1, 15)) %>%
  release("nurse", 1) %>%
  ## add a consultation activity
  seize("doctor", 1) %>%
  timeout(function() rnorm(1, 20)) %>%
  release("doctor", 1) %>%
  ## add a planning activity
  seize("administration", 1) %>%
  timeout(function() rnorm(1, 5)) %>%
  release("administration", 1)

t0

t1 <- create_trajectory("trajectory with a branch") %>%
  seize("server", 1) %>%
  ## 50-50 chance for each branch
  branch(function() sample(1:2, 1), merge=c(TRUE, FALSE), 
    create_trajectory("branch1") %>%
      timeout(function() 1),
    create_trajectory("branch2") %>%
      timeout(function() rexp(1, 3)) %>%
      release("server", 1)
  ) %>%
  ## only the first branch continues here
  release("server", 1) %>%
  timeout(function() 2)

t1
# }