title: Performing a sensitivity analysis with python
body: <p>I'm trying to perform a sensitivity analysis and I started to learn python so I wanted to accomplish this in python. I found a package called <code>SALib</code> but I don't really get how to implement my own equation.
  For example this is my equation:</p>
  
  <pre><code>ET = 0,0031*C*(R+209)*(t*(t+15)**-1)
  </code></pre>
  
  <p>At first I have to define my problem:</p>
  
  <pre><code>problem = {'num_vars': 3,
             'names': ['C', 'R', 't'],
             'bounds': [[10, 100],
                       [3, 7],
                       [-10, 30]]
             }
  </code></pre>
  
  <p>After this I have to generae Input Samples but I how do I generate these with my own equation? Maybe someone has expierience with SALib and can help me. I don't find the package documentation really helpful.</p>