title: how to convert multidimensional array to string in idl
body: <p>I have an array of floats or doubles lets call it foo. When I do </p>
  
  <pre><code>size(foo)
  </code></pre>
  
  <p>I get these 5 dimensions</p>
  
  <pre><code>2          67       52100           4     3498338
  </code></pre>
  
  <p>I would like to convert it to a string like</p>
  
  <pre><code>str="strcture={arr:"+foo+"}"
  </code></pre>
  
  <p>so that I can then do</p>
  
  <pre><code>Execute(str)
  </code></pre>
  
  <p>How can I convert <code>foo</code> to a string dynamically?</p>