Question

我正在尝试将get_mon_resources存储到数据变量中。

library(simmer) 

SystemTime <- 200
delay= c(20,40,60,80,100,120,140,160,180,200)/60
set.seed(1234)

elevators <-lapply(1:100, function(i) {
  elevator <- simmer("elevator")

  worker <-
    trajectory("elevator service") %>% #trajectory name
    log_("new worker arrived") %>% #
    set_attribute("start_time", function() {now(elevator)}) %>%
    seize("elevator",amount = 1) %>% #elevator queue and service 
    timeout(function() sample(delay,1)) %>%
    log_(function() {paste("Waited: ", now(elevator) - get_attribute(elevator, "start_time"))}) %>%
    release("elevator") 

  elevator %>%
    add_generator("worker", worker, function() rexp(1, 2)) %>% 
    add_resource("elevator", capacity = 2) %>% 
    run(until = SystemTime)
    mydata <- get_mon_resources(elevator)
})

但mydata <- get_mon_resources(elevator)命令行不起作用

Answer 1

您尚未将mydata变量声明为全局变量，因为您无法访问外部变量。使用以下代码访问mydata <- get_mon_resources(elevator)

mydata <<- get_mon_resources(elevator)

Answer 2

library(simmer) 

SystemTime <- 200
delay= c(20,40,60,80,100,120,140,160,180,200)/60
Start_times <<-data.frame(row.names=TRUE)

set.seed(1234)

elevators <-lapply(1:10, function(i) {
  elevator <- simmer("elevator")

  worker <-
    trajectory("elevator service") %>% #trajectory name
    log_("new worker arrived") %>% #
    set_attribute("start_time", function() {now(elevator)}) %>%
    seize("elevator",amount = 1) %>% #elevator queue and service 
    timeout(function() sample(delay,1)) %>%
    Start_times<<-rbind(get_attribute(elevator, "start_time"),Start_times)%>%
    log_(function() {paste("Waited: ", now(elevator) - get_attribute(elevator, "start_time"))}) %>%
    release("elevator") 

  elevator %>%
    add_generator("worker", worker, function() rexp(1, 2)) %>% 
    add_resource("elevator", capacity = 2) %>% 
    run(until = SystemTime)




})

Answer 3

get_mon_*()方法也适用于模拟列表：

library(simmer)

SystemTime <- 200
delay= c(20,40,60,80,100,120,140,160,180,200)/60
set.seed(1234)

elevators <-lapply(1:100, function(i) {
  elevator <- simmer("elevator")

  worker <-
    trajectory("elevator service") %>% #trajectory name
    #log_("new worker arrived") %>% #
    set_attribute("start_time", function() {now(elevator)}) %>%
    seize("elevator",amount = 1) %>% #elevator queue and service 
    timeout(function() sample(delay,1)) %>%
    #log_(function() {paste("Waited: ", now(elevator) - get_attribute(elevator, "start_time"))}) %>%
    release("elevator") 

  elevator %>%
    add_generator("worker", worker, function() rexp(1, 2)) %>% 
    add_resource("elevator", capacity = 2) %>% 
    run(until = SystemTime)
})

mydata <- get_mon_resources(elevators)
head(mydata)
#>   resource     time server queue capacity queue_size system limit replication
#> 1 elevator 1.250879      1     0        2        Inf      1   Inf           1
#> 2 elevator 1.254170      2     0        2        Inf      2   Inf           1
#> 3 elevator 1.420254      2     1        2        Inf      3   Inf           1
#> 4 elevator 1.434505      2     2        2        Inf      4   Inf           1
#> 5 elevator 1.628096      2     3        2        Inf      5   Inf           1
#> 6 elevator 1.673071      2     4        2        Inf      6   Inf           1

Answer 4

如何将此值增加lapply(1:10, function(i)？

R和Simmer将数据插入变量

4 个答案: