从命令行运行 R 命令

Question

有没有办法从命令行运行 R 命令？就像是

$ R --run '1+1'
2

甚至喜欢

$ Rscript < '1+1'
2

Answer 1

命令行选项 -e正是这样做的。

Rscript.exe -e "1+1"

[1] 2

如果你只是运行 RScript，你得到的帮助中已经清楚地说明了这一点。不带参数:

Usage: /path/to/Rscript [--options] [-e expr [-e expr2 ...] | file] [args]

--options accepted are
  --help              Print usage and exit
  --version           Print version and exit
  --verbose           Print information on progress
  --default-packages=list
                      Where 'list' is a comma-separated set
                        of package names, or 'NULL'
or options to R, in addition to --slave --no-restore, such as
  --save              Do save workspace at the end of the session
  --no-environ        Don't read the site and user environment files
  --no-site-file      Don't read the site-wide Rprofile
  --no-init-file      Don't read the user R profile
  --restore           Do restore previously saved objects at startup
  --vanilla           Combine --no-save, --no-restore, --no-site-file
                        --no-init-file and --no-environ

'file' may contain spaces but not shell metacharacters
Expressions (one or more '-e <expr>') may be used *instead* of 'file'
See also  ?Rscript  from within R