<blockquote> <table border="0" cellpadding="5" cellspacing="0" style="width:100%"> <tbody> <tr> <td> <p>In general, the array data that we put in GeneNetwork has be logged and then z normalized, but instead of leaving the mean at 0 and the standard deviation of 1 unit, we shift up to a mean of 8 units and increase the spread by having an standard deviation of 2 units (what we call 2Z + 8 normalized data). This removes negative values from the tables.</p> </td> </tr> </tbody> </table> </blockquote>