title: gnuplot : 3d plot an electromagnetic wave function
body: <p>Is it possible to do this with gnuplot? Something like on this image (link)</p>
  
  <p><a href="http://i.stack.imgur.com/mZ3M0.gif" rel="nofollow">http://i.stack.imgur.com/mZ3M0.gif</a></p>
  
  <p>I cannot seem to be able to set x = sin(y) and z = sin(y) independently. seeking help!</p>
  
  <p>Thank you!</p>