
The Archimedean spiral is a spiral named after the Greek mathematician Archimedes.



An Archimedean spiral can be described by the equation:






r
=
a
+
b
θ


{\displaystyle \,r=a+b\theta }


with real numbers a and b.



Task
Draw an Archimedean spiral.




  'InitCauseway' 'View' ⎕CY 'sharpplot'
  InitCauseway ⍬   ⍝ initialise current namespace
  sp←⎕NEW Causeway.SharpPlot                                               
  sp.DrawPolarChart {⍵(360|⍵)}⌽⍳720
      View sp