我是R包开发和堆栈溢出的新手,但我在任何地方都找不到这些信息。
我正在尝试加载R包mice,但不要让它污染我的命名空间。我已经尝试过只导入我使用的函数,但没有成功。所以,我将接受在一个特定环境中加载整个软件包的解决方案:
e <- new.env()
load_package_into_environment(e, package = "mice")
eval(mice(data, m = m, maxit = max.iter, printFlag = F), envir = e)
然而,我还没有找到替换"load_package_into_environment"占位符的实际功能。如果有的话,哪个函数能够完成这个任务?
编辑:以下是我正在处理的文件和遇到的问题,以提供更多细节。
文件:DESCRIPTION
Package: bug.example2
Title: Example of Package Loading Bug
Version: 0.0.0.9000
Authors@R: person("R", "Woodbridge", email = "example@gmail.com", role = c("aut", "cre"))
Description: Creates a wrapper function for mice::mice function.
Depends:
R (>= 3.2.3),
data.table (>= 1.9.6)
License:
LazyData: true
Imports: mice
RoxygenNote: 5.0.1
文件: NAMSPACE (自动由Roxygen生成)
该文件是Roxygen自动生成的命名空间文件。
import(data.table)
importFrom(mice,mice)
importFrom(mice,mice.impute.logreg)
importFrom(mice,mice.impute.pmm)
importFrom(mice,mice.impute.polr)
importFrom(mice,mice.impute.polyreg)
文件: impute.R (使用mice包中的mice函数)
#' @import data.table
#' @importFrom mice mice
#' @importFrom mice mice.impute.pmm
#' @importFrom mice mice.impute.logreg
#' @importFrom mice mice.impute.polyreg
#' @importFrom mice mice.impute.polr
#' @export
impute <- function(data, m = 5, max.iter = 5){
mice_environment <- new.env()
#Impute missing data using mice function, output format is mids object
mice.out <- mice(data, m = m, maxit = max.iter, printFlag = F)
#save the m imputed data.frames as a list of data.tables
return.list <- lapply(1:m, function(x){
as.data.table(complete(mice.out, x))
})
names(return.list) <- paste0("imp.",1:m)
return.list
}
文件:test-impute.R(使用testthat包测试impute函数)
context("Impute missing values")
test_that("Output format is a list of lenght m and each element is a data.table",{
#Set up data
set.seed(200)
data <- iris
data$Species[runif(nrow(data)) < .1] <- NA
data$Sepal.Width[runif(nrow(data)) < .2] <- NA
setDT(data)
#Create imputed data
M <- 5
impute.output <- impute(data, m = M)
#Test output format
expect_is(impute.output, "list")
expect_equal(length(impute.output), M)
lapply(impute.output,expect_is, "data.table")
})
来自testthat的错误输出
1. Error: Output format is a list of lenght m and each element is a data.table -
The following functions were not found: mice.impute.pmm, mice.impute.polyreg
1: withCallingHandlers(eval(code, new_test_environment), error = capture_calls, message = function(c) invokeRestart("muffleMessage"))
2: eval(code, new_test_environment)
3: eval(expr, envir, enclos)
4: impute(data, m = M) at test-impute.R:12
5: mice(data, m = m, maxit = max.iter, printFlag = F) at C:\repos\bug.example2/R/impute.R:11
6: check.method(setup, data)
7: stop(paste("The following functions were not found:", paste(fullNames[notFound],
collapse = ", ")))
importFrom
是我的第一种尝试,但我已经导入了我调用的所有函数和所有相关的依赖函数,但是当我尝试构建包时仍然会收到一条消息,指出某些这些依赖函数未找到。我认为这是 mice 构建方式的结果。 - r.woodbridge