added sorting to freq and PSD such that you no longer get the straight line across the bottom
added sorting to freq and PSD such that you no longer get the straight line across the bottom

AshleySetter/datahandling,markusrademacher/datahandling,AshleySetter/datahandling,markusrademacher/datahandling,AshleySetter/optoanalysis,AshleySetter/optoanalysis