fable 封装的 ARIMA 算法可以并行工作吗？

Question

我正在尝试使用 fable 包创建 1000 家商店的预测。包是否fable像函数一样并行工作forecast？

非常感谢

Answer 1

plan()您可以使用future 包并行拟合模型。

可以使用 future 包并行估计模型。通过在估计模型之前指定 future::plan() ，将根据该计划计算它们。

https://fabletools.tidyverts.org/reference/model.html

library(fable)
#> Loading required package: fabletools
library(dplyr)
library(future)

plan(multisession)

tsibbledata::aus_retail %>%
  filter(
    Industry == "Food retailing"
  ) %>%
  model(
    snaive = SNAIVE(Turnover),
    ets = ETS(log(Turnover) ~ error("A") + trend("A") + season("A")),
  )
#> # A mable: 8 x 4
#> # Key:     State, Industry [8]
#>   State                        Industry         snaive          ets
#>   <chr>                        <chr>           <model>      <model>
#> 1 Australian Capital Territory Food retailing <SNAIVE> <ETS(A,A,A)>
#> 2 New South Wales              Food retailing <SNAIVE> <ETS(A,A,A)>
#> 3 Northern Territory           Food retailing <SNAIVE> <ETS(A,A,A)>
#> 4 Queensland                   Food retailing <SNAIVE> <ETS(A,A,A)>
#> 5 South Australia              Food retailing <SNAIVE> <ETS(A,A,A)>
#> 6 Tasmania                     Food retailing <SNAIVE> <ETS(A,A,A)>
#> 7 Victoria                     Food retailing <SNAIVE> <ETS(A,A,A)>
#> 8 Western Australia            Food retailing <SNAIVE> <ETS(A,A,A)>

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