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Input and Output Files

The following shows how to use files for running commands (input) and output:

# A sink records output to the given file.
# To print to both the screen and to a file (tee), use the following variation:
sink(file = "outputFile", split = TRUE)
source("chapter7/foo.R") # executes R code written in a text file
system("cat outputFile") # prints what was captured by the sink above
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
XXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXXX
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