title: Create vector of values with random increments
body: <p>If we start with a vector between 0 and 1 with 10 increments</p>
  <pre><code>z = np.linspace(0,1,10)
  </code></pre>
  <p>how can I create a different version of this vector, where the increments are drawn according to a Poisson distribution with intensity lambda? Would I have to use something like cumsum?</p>