title: How to 3D plot a loss function with y, x1 and x2, with no beta0?
body: <p>I am not sure how to plot the MSE function (loss function) on a 3D plot with the variables (y,x1 and x2). The below portion is what I have tried. b1 and b2 are beta 1 and beta 2.</p>
  
  <pre><code> def MSE (y, x1, x2):
        MSE = np.square(np.subtract(y,b1x1,b2x2)).mean() 
  
   for i in range(0,506): 
        b1=i
        b2=i
  </code></pre>