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当我尝试使用future_applywith 时plan(multisession)，它说我尝试使用的包不存在。当我使用它时plan(sequential)，它工作正常。使用时我也遇到同样的错误plan(callr)。

这是错误：

Error in loadNamespace(name): there is no package called 'fuzzyjoin'

谁能帮我找出解决方案或这里出了什么问题？

我不确定这是否与 future.apply 包或 future 或 globals 包有关，因为我知道它们也参与其中。

这是我的代码显示问题：

library(fuzzyjoin)
library(future.apply)
#> Loading required package: future
library(dplyr)
#> Attaching package: 'dplyr'
#> The following objects are masked from 'package:stats':
#> 
#>     filter, lag
#> The following objects are masked from 'package:base':
#> 
#>     intersect, setdiff, setequal, union
library(tidyr)


iris_mod<- iris %>%
  mutate(examplefield= Sepal.Width + Petal.Length,
         Species = as.character(Species))


iristype <- iris_mod$Species %>% unique()

plan(sequential)

test_sequential <- future_lapply(iristype, 
                               FUN = function(x) {
                                 fuzzyjoin::fuzzy_left_join(
                                   iris_mod %>% filter(Species %in% x),
                                    iris_mod, 
                                    by = c("Species"="Species",
                                           "examplefield"="Sepal.Length"),
                                    match_fun = list(`==`, `<`)
                                 )},
                               future.chunk.size= 2
)


plan(multisession)

test_multisession <- future_lapply(iristype, 
                                   FUN = function(x) {
                                     fuzzyjoin::fuzzy_left_join(
                                       iris_mod %>% filter(Species %in% x),
                                        iris_mod, 
                                        by = c("Species"="Species",
                                               "examplefield"="Sepal.Length"),
                                        match_fun = list(`==`, `<`)
                                     )},
                                   future.chunk.size=2
)
#> Error in loadNamespace(name): there is no package called 'fuzzyjoin'

由reprex 包于 2022-01-28 创建(v2.0.1)

如果相关，我正在运行 R v4.0.3。

4

1 回答 1

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我运行了以下代码，发现由于某种原因没有正确传递库路径。我的肮脏修复只是为了确保将软件包安装在future正在查找的 libPath 上。

install.packages("fuzzyjoin", lib= "C:/Program Files/R/R-4.0.3/library" )

这是我运行以发现我的正常会话和 future_lapply/future 会话使用不同的库路径的代码：

.libPaths()
# [1] "\\\\networkfileservername/Userdata/myusername/Home/R/win-library/4.0" "C:/Program Files/R/R-4.0.3/library"    


f_libs%<-% .libPaths()
print(f_libs)
# [1] "C:/Program Files/R/R-4.0.3/library"
于 2022-01-30T21:39:33.477 回答