R tools for writing HH2: hhpdf, hhdev.off, hhcapture, hhcode, hhpng, hhlatex.
These functions in the HH package are placeholders used by
the scripts files. See details.
hhpdf(file, ...)hhdev.off(...)
hhcapture(file, text, echo=TRUE, print.eval=TRUE)
hhcode(file, text)
hhpng(file, ...)
hhlatex(file="", ...)
Output file name. Ignored.
Multi-line character string. It will be
displayed on the console by hhcode, and will be executed
and the resulting value displayed on the console by
hhcapture.
Ignored.
See source.
The files in HHscriptnames()
contain R code for all examples and figures in the book.
The examples can all be directly executed by the user.
The code examples all use these functions.
The versions of these functions here are essentially placeholders.
Functions hhpdf, hhpng, and hhdev.off are no-ops and return NULL.
As a consequence, the code between them will execute and display on
the default graphics device.
Function hhcapture sources its text argument and prints the
output to the console.
Function hhcode prints its text argument to the console.
Function hhlatex prints the latex source to the
console and returns NULL.
While writing the book, these placeholder functions are replaced by more elaborate functions with the same names that write the graphs onto pdf or png files, the console output to text files, and the latex code to a file.