Find potentially biasing paths in a DAG.
This identifies paths linking exposure and outcome in a DAG. Forward paths (including a directed arc emanating from the exposure) are not identified.
find.paths(dag)
dag |
A DAG for which paths should be found. |
A DAG with components pathsN (number of paths identified) and paths (matrix with each row describing one path by indicating the arcs forming the path; ends with NA as some other function recognize the end of the path that way) added.
Lutz P Breitling <l.breitling@posteo.de>
Breitling LP (2010). dagR: a suite of R functions for directed acyclic graphs. Epidemiology 21(4):586-587.
Greenland S, Pearl J, Robins JM (1999). Causal diagrams for epidemiologic research. Epidemiology 10(1):37-48.
demo.dag1(); find.paths(demo.dag1());
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