title: Finding similarity measure between 2 plots..?
body: <p>sorry if my question sounds very amateurish..</p>
  
  <p>Actually I have a set of plots in 2d form</p>
  
  <p>Let X=(x1,x2...xn) be a set of similar plots obtained</p>
  
  <pre><code>Y=(y1,y2...yn) be a set of plots similar
  </code></pre>
  
  <p><img src="https://i.stack.imgur.com/mptyP.jpg" alt="enter image description here"></p>
  
  <p>Intuitively i can see that all plots of X 'look similar'  But how do i find the similarity between scores between 2 plots and prove that they have a high similarity score..?? </p>
  
  <p>I am using the R language... Can somebody help..??Thanks</p>