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flying-sheep/helpgrep.R

Created January 16, 2015 13:07
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helpgrep.R
helpgrep = function(pattern, topic) {
helpfile = utils:::.getHelpFile(do.call(help, list(topic)))
temp = tools::Rd2txt(helpfile, out = tempfile('Rtxt'))
str = readChar(temp, file.info(temp)$size)
unlink(temp)
lins = unlist(strsplit(str, '\n'))
lins[grep(pattern, lins)]
}
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