[R] R as Unix-Filter and Streams for DataMining

[Douglas Bates]

"John D. Barnett" <jbarnett at wi.mit.edu> writes:

> Two (klugey) ideas--
> 
> - write a script which reads standard input, and reads a file, and outputs
> both of them to standard output.  (Maybe there's a command that does this
> already; anyone know?)  

Most Unix/Linux systems have a command called "tee", which makes
"T-joints" in pipes.

$ tee --help
Usage: tee [OPTION]... [FILE]...
Copy standard input to each FILE, and also to standard output.

  -a, --append              append to the given FILEs, do not overwrite
  -i, --ignore-interrupts   ignore interrupt signals
      --help                display this help and exit
      --version             output version information and exit
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