title: Spotfire: how to access calculated value programatically
body: <p>So, for example to access/change the "limit data using expression" property corresponding to a barchart I do:</p>
  
  <pre><code>from Spotfire.Dxp.Application.Visuals import BarChart
  chart1 = Viz.As[BarChart]()
  filter = '[CS_AGE] Is Not Null'
  chart1.Data.WhereClauseExpression = filter
  </code></pre>
  
  <p>My question is: how can I access the "limit data using expression" property corresponding to a <em>calculated values</em> (The ones you create in a text filed using "insert dynamic item>calculated values")</p>