R语言比较已安装的软件包和类似CRAN的存储库new.packages()函数-中英文对照帮助文档

MicroRbt

        R语言比较已安装的软件包和类似CRAN的存储库new.packages()函数-中英文对照帮助文档

                                         By MicroRbt Martinez PhD

R语言函数名：new.packages()
R语言函数功能：比较已安装的软件包和类似CRAN的存储库
来自资源库：基础库（R语言自带）
new.packages()函数所属R语言包：所在R包具体名称、包功能的中英文双语描述见正文后面'--所在R语言包信息--'部分。

描述-----Description-----

old.packages indicates packages which have a (suitable) later version on the repositories whereas update.packages offers to download and install such packages.
old.packages表示存储库上具有（合适）更高版本的软件包，而update.packages表示下载并安装此类软件包。

new.packages looks for (suitable) packages on the repositories that are not already installed, and optionally offers them for installation.
new.packages在尚未安装的存储库中查找（合适的）软件包，并有选择地提供它们进行安装。


使用方法-----Usage-----

update.packages(lib.loc = NULL, repos = getOption("repos"),
contriburl = contrib.url(repos, type),
method, instlib = NULL,
ask = TRUE, available = NULL,
oldPkgs = NULL, ..., checkBuilt = FALSE,
type = getOption("pkgType"))
old.packages(lib.loc = NULL, repos = getOption("repos"),
contriburl = contrib.url(repos, type),
instPkgs = installed.packages(lib.loc = lib.loc, ...),
method, available = NULL, checkBuilt = FALSE, ...,
type = getOption("pkgType"))
new.packages(lib.loc = NULL, repos = getOption("repos"),
contriburl = contrib.url(repos, type),
instPkgs = installed.packages(lib.loc = lib.loc, ...),
method, available = NULL, ask = FALSE, ...,
type = getOption("pkgType"))

参数-----Arguments-----

参数lib.loc介绍: character vector describing the location of R library trees to search through (and update packages therein), or NULL for all known trees (see .libPaths).
字符向量，用于描述R库树的位置以进行搜索（并更新其中的程序包），或者NULL查找所有已知树（请参阅.libPaths）。

参数repos介绍: character vector, the base URL(s) of the repositories to use, e.g., the URL of a CRAN mirror such as "https://cloud.r-project.org".
字符向量，要使用的存储库的基本URL，例如CRAN镜像的URL，例如"https://cloud.r-project.org"。

参数contriburl介绍: URL(s) of the contrib sections of the repositories. Use this argument if your repository is incomplete. Overrides argument repos. Incompatible with type = "both".
存储库的contrib部分的URL。如果您的存储库不完整，请使用此参数。覆盖参数repos。与type = "both"不兼容。

参数method介绍: Download method, see download.file. Unused if a non-NULL available is supplied.
下载方法，请参阅download.file。如果提供了非NULL available，则不使用。


参数instlib介绍: character string giving the library directory where to install the packages.
字符串，给出库目录的安装目录。

参数ask介绍: logical indicating whether to ask the user to select packages before they are downloaded and installed, or the c

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