automatically extract learner param description from help page

[berndbischl]

No description provided.

[giuseppec]

This might be helpful openml/openml-r#276

[giuseppec]

Does anyone know something better than this:

library(XML)

getLearnerParamHelp = function(fun) {
  # the R package containing 'fun' must be loaded
  html = capture.output(tools:::Rd2HTML(utils:::.getHelpFile(help(fun))))
  html = htmlParse(html)
  tab = getNodeSet(html, "//table[@summary='R argblock']")
  XML::readHTMLTable(tab[[1]], header = FALSE)
}

library(ranger)
getLearnerParamHelp("ranger")

[mb706]

Very nice! I'll try to add it to the learnerHelp pr later.

[mb706]

Closed by #1657