Added nargin function

man/nargin.Rd

@@ -0,0 +1,23 @@
+% Generated by roxygen2: do not edit by hand
+% Please edit documentation in R/nargin.R
+\name{nargin}
+\alias{nargin}
+\title{Number of function input arguments}
+\usage{
+nargin()
+}
+\value{
+An integer
+}
+\description{
+Returns the number of arguments passed to the parent function
+}
+\note{
+This function only makes sense inside another function
+}
+\references{
+https://stackoverflow.com/q/64422780/1169233
+}
+\author{
+Waldir Leoncio
+}