Renders a DOT graph string using DiagrammeR::grViz.
If the DiagrammeR package is not installed, prints the DOT source
to the console instead.
This method handles all DOT objects produced by the nmfkc package:
nmfkc.DOT, nmfae.DOT, nmf.sem.DOT,
and nmfkc.ar.DOT.
Usage
# S3 method for class 'nmfkc.DOT'
plot(x, ...)