我已经实现了无声安装和加载所需R包的功能。希望也许会有所帮助。代码如下:

# Function to Install and Load R Packages
Install_And_Load <- function(Required_Packages)
{
    Remaining_Packages <- Required_Packages[!(Required_Packages %in% installed.packages()[,"Package"])];

    if(length(Remaining_Packages)) 
    {
        install.packages(Remaining_Packages);
    }
    for(package_name in Required_Packages)
    {
        library(package_name,character.only=TRUE,quietly=TRUE);
    }
}

# Specify the list of required packages to be installed and load    
Required_Packages=c("ggplot2", "Rcpp");

# Call the Function
Install_And_Load(Required_Packages);

 48 lapply_install_and_load <- function (package1, ...)
 49 {
 50     #
 51     # convert arguments to vector
 52     #
 53     packages <- c(package1, ...)
 54     #
 55     # check if loaded and installed
 56     #
 57     loaded        <- packages %in% (.packages())
 58     names(loaded) <- packages
 59     #
 60     installed        <- packages %in% rownames(installed.packages())
 61     names(installed) <- packages
 62     #
 63     # start loop to determine if each package is installed
 64     #
 65     load_it <- function (p, loaded, installed)
 66     {
 67         if (loaded[p])
 68         {
 69             print(paste(p, "loaded"))
 70         }
 71         else
 72         {
 73             print(paste(p, "not loaded"))
 74             if (installed[p])
 75             {
 76                 print(paste(p, "installed"))
 77                 do.call("library", list(p))
 78             }
 79             else
 80             {
 81                 print(paste(p, "not installed"))
 82                 install.packages(p)
 83                 do.call("library", list(p))
 84             }
 85         }
 86     }
 87     #
 88     lapply(packages, load_it, loaded, installed)
 89 }

我使用以下将检查包是否安装和依赖项是否更新，然后加载包。

p<-c('ggplot2','Rcpp')
install_package<-function(pack)
{if(!(pack %in% row.names(installed.packages())))
{
  update.packages(ask=F)
  install.packages(pack,dependencies=T)
}
 require(pack,character.only=TRUE)
}
for(pack in p) {install_package(pack)}

completeFun <- function(data, desiredCols) {
  completeVec <- complete.cases(data[, desiredCols])
  return(data[completeVec, ])
}

是的。如果您有软件包列表，请将其与installed.packages()[，"Package"]的输出进行比较，然后安装缺少的软件包。就像这样:

list.of.packages <- c("ggplot2", "Rcpp")
new.packages <- list.of.packages[!(list.of.packages %in% installed.packages()[,"Package"])]
if(length(new.packages)) install.packages(new.packages)

否则:

如果您将代码放在包中并使它们成为依赖项，那么当您安装包时，它们将自动安装。

library <- function(x){
  x = toString(substitute(x))
if(!require(x,character.only=TRUE)){
  install.packages(x)
  base::library(x,character.only=TRUE)
}}

这适用于不带引号的包名，并且相当优雅(参见GeoObserver的答案)

在我的例子中，我想要一个可以从命令行(实际上是通过Makefile)运行的一行程序。下面是一个安装“VGAM”和“feather”的例子，如果它们还没有安装:

R -e 'for (p in c("VGAM", "feather")) if (!require(p, character.only=TRUE)) install.packages(p, repos="http://cran.us.r-project.org")'

在R内部，它就是:

for (p in c("VGAM", "feather")) if (!require(p, character.only=TRUE)) install.packages(p, repos="http://cran.us.r-project.org")

除了前面的解之外，这里没有别的解:

我只说一句 我硬编码回购参数(以避免任何弹出窗口询问使用的镜像) 我不想费心定义一个在其他地方使用的函数

还要注意重要的字符。only=TRUE(如果没有它，require将尝试加载包p)。