title: How to use ezplot in MATLAB?
body: <p>I want to use <code>ezplot</code> in MATLAB, and because the function I want to plot consists of a large number of terms I may split it into smaller functions. Let me give an example of a small number of terms and it can be generalized to a large number of terms. To plot the function:</p>
  
  <pre><code>y2+xy+xy3+x+1=0
  </code></pre>
  
  <p>I let <code>y1=x+1</code> and I write the following in MATLAB:</p>
  
  <pre><code>x=[0:1:5]
  y1=x+1
  ezplot('y.^2+x*y+x*y.^3+y1')
  </code></pre>
  
  <p>But there is an error. Please tell me how can I correct the error. Is it possible to use this feature (splitting the equation or function into a number of terms)?</p>