[data_new, new_x] = data_select_features(data, v, v_type) Manual feature selection. v contains ranges or an index list (see v_type below) to include, 1 in each row. v_type: 'rx' if v is expressed in the same unit as data.x 'ri' if v contains index ranges 'i' if v contains feature indexes Example: v = [1800, 1474; 1432, 1401; 1313, 1176; 1134, 900], if v_type == 'x' or v = [1 86;97 105;128 163;174 235], if v_type == 'i'