set_parent: Specify the parent document of child documents
Description
This function extracts the LaTeX preamble of the parent
document to use for the child document, so that the child
document can be compiled as an individual document.
Usage
set_parent(parent)
Arguments
parent
path to the parent document (relative to
the current child document)
Value
The preamble is extracted and stored to be used later
when the complete output is written.
Details
When the preamble of the parent document also contains
code chunks and inline R code, they will be evaluated as
if they were in this child document. For examples, when
knitr hooks or other options are set in the
preamble of the parent document, it will apply to the
child document as well.