def load_scaleogram(scal_filename):
    
    if os.path.isfile(scal_filename):
        scaleogram = ls.load_csv(scal_filename)
        
        return [scaleogram, scal_filename]
    
    return None
def load_scaleogram(freq, segment_type, train_index=None, subject_type=None, subject_num=None, sample_num=None, elec_index=None):
    
    scal_filename = get_scal_filename(freq, segment_type, train_index=train_index, subject_type=subject_type, subject_num=subject_num, sample_num=sample_num, elec_index=elec_index)
    
    if os.path.isfile(scal_filename):
        scaleogram = ls.load_csv(scal_filename)
        
        return [scaleogram, scal_filename]
    
    return None