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Using header arguments
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Header arguments
14.8.2 Specific header arguments
The following header arguments are defined:
var
: Pass arguments to code blocks
results
: Specify the type of results and how they will be collected and handled
file
: Specify a path for file output
dir
: Specify the default (possibly remote) directory for code block execution
exports
: Export code and/or results
tangle
: Toggle tangling and specify file name
comments
: Toggle insertion of comments in tangled code files
no-expand
: Turn off variable assignment and noweb expansion during tangling
session
: Preserve the state of code evaluation
noweb
: Toggle expansion of noweb references
cache
: Avoid re-evaluating unchanged code blocks
hlines
: Handle horizontal lines in tables
colnames
: Handle column names in tables
rownames
: Handle row names in tables
shebang
: Make tangled files executable
eval
: Limit evaluation of specific code blocks