#!/usr/bin/gawk -f

BEGIN{
  IGNORECASE=1;
  FS=OFS=",";
  data=0;
}

data==1{
  for ( i=1; i < NF; i++ )
  {
    if ( $i <  0.0001 ) $i = 0.0001;
    $i = log($i);
  }
}

/@data/{data=1;}

{print;}