Method used to obtain V/R and DPS for different shape profiles (solid black line). Case 1 (left panel): distinguished DPS profile. The Gaussian fits are represented in pink and red for the violet and red peaks, respectively. The dashed lines indicate the Gaussian fit’s center and the values for both peak intensities. Values for this example are in the legend of the plot. Case 2 (middle panel): the code selects the maximum intensities from each side of the center (dashed vertical lines). Case 3 (right panel): flat emission line. For these cases, the peaks were selected by visual inspection from each side of the geometrical center of the line (dashed vertical lines).