Class07 Answer:

Write an R script and then run it

I did this lab; it was easy:

R -f hello.r

The script looks like this:

# hello.r

# Demo:
# R -f hello.r


I saw this:

dan@e80:~/ml4us/public/class07 $ 
dan@e80:~/ml4us/public/class07 $ R -f hello.r 

R version 3.2.3 (2015-12-10) -- "Wooden Christmas-Tree"
Copyright (C) 2015 The R Foundation for Statistical Computing
Platform: x86_64-pc-linux-gnu (64-bit)

R is free software and comes with ABSOLUTELY NO WARRANTY.
You are welcome to redistribute it under certain conditions.
Type 'license()' or 'licence()' for distribution details.

  Natural language support but running in an English locale

R is a collaborative project with many contributors.
Type 'contributors()' for more information and
'citation()' on how to cite R or R packages in publications.

Type 'demo()' for some demos, 'help()' for on-line help, or
'help.start()' for an HTML browser interface to help.
Type 'q()' to quit R.

> # hello.r
> # Demo:
> # R -f hello.r
> print('hello')
[1] "hello"
> 'bye'
[1] "bye"
dan@e80:~/ml4us/public/class07 $ 
dan@e80:~/ml4us/public/class07 $ 

I noticed that unlike Python, Ruby, JavaScript, Scala, and Java, R wants to 'echo' each statement as it runs.

Usually I like this behavior.

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