https://haozhestat.r-universe.dev/rfintervalhttps://haozhestat.r-universe.dev/api/packages/rfintervalhttps://haozhestat.r-universe.dev/rfinterval/rfinterval.pdfhttps://haozhestat.r-universe.dev/rfinterval/doc/manual.htmlhttps://haozhestat.r-universe.dev/rfinterval/citationhttps://haozhestat.r-universe.dev/rfinterval/citation.txthttps://haozhestat.r-universe.dev/rfinterval/citation.cff