如何在Windows上安装cran包？

Question

我打字的例子如下:

install.packages('TTR')

输出是:

--- Please select a CRAN mirror for use in this session ---
trying URL 'http://mirrors.softliste.de/cran/bin/windows/contrib/2.12/TTR_0.20-2.zip'
Content type 'application/zip' length 237131 bytes (231 Kb)
opened URL
downloaded 231 Kb

package 'TTR' successfully unpacked and MD5 sums checked

The downloaded packages are in
        C:\Documents and Settings\Administrator\Local Settings\Temp\Rtmp33oIzT\downloaded_packages

但是,即使在重新启动属于该软件包的环境函数后,也无法识别,例如EMA() - >错误:找不到函数"EMA".是否有任何命令命令来实际安装这些下载的包.

在shell中使用"R CMD INSTALL"命令但是当我输入时:

R CMD INSTALL TTR

我明白了:

Warning: invalid package 'TTR'
Error: ERROR: no packages specified

Answer 1

您的R安装附带了R 简介的副本.如果您浏览目录,您会看到" 软件包"部分,您的问题将在第二句中得到解答.