title: matlab "from workspace" block has error
body: <p>If have an <code>array (5000x1 double)</code> in matlab workspace. I put the <code>'from workspace'</code> block in simulink window for input of another block, But when run the program this error occurred: </p>
  
  <pre><code>Invalid matrix-format variable specified as workspace input in 'new_net_pattern_recog/From Workspace'. The matrix must have two dimensions and at least two columns. Complex signals of any data type and non-double real signals must be in structure format. The first column must contain time values and the remaining columns the data values. Matrix values cannot be Inf or NaN.
  </code></pre>
  
  <p>What can I do?</p>