title: Plotting using PolyCollection in matplotlib
body: <p>I am trying to plot a 3 dimensional plot in matplotlib. I have to plot Frequency vs Amplitude Distribution for four (or multiple) Radii in a single 3D plot. I was looking at PolyCollection command available in matplotlib.collections and I also went through the example but I do not know how to use the existing data to arrive at the plot.</p>
  
  <p>The dimensions of the quantities that I have are,</p>
  
  <p>Frequency : 4000 x 4,
  Amplitude : 4000 x 4,
  Radius    : 4</p>
  
  <p>I would like to plot something like,
  <img src="https://i.stack.imgur.com/6JZo7.png" alt="enter image description here"></p>
  
  <p>With X axis being Frequencies, Y axis being Radius, and Z axis being Amplitudes. How do I go about solving this problem?</p>