1$variation_array = array(
2  'float 10.5' => 10.5,
3  'float -10.5' => -10.5,
4  'float 12.3456789000e10' => 12.3456789000e10,
5  'float -12.3456789000e10' => -12.3456789000e10,
6  'float .5' => .5,
7  );