title: Manually Drawing Curves on R like Paint
body: <p>I was trying to allow the user to give a curve as input for some analysis. Is there a package that can be used in this regard? Basically, a GUI like paint wherein the user can draw a simple curve and which would be stored in R as a set of data points or as an equation if its a simple curve. </p>
  
  <p>Thanks
  Gopher</p>