Trends with distance from the galactic center. The left and right panels respectively show the medians (solid curves) and the 16^th–84^th percentile ranges (shaded regions) for the average radial velocity (V_r, in units of V_rot) and the radial mass flux (F_r, in units of ℳ/t_dyn) as functions of r (in units of R_d) derived from our sample of disk galaxies. The median values of both V_r and F_r are consistently negative and become more negative with increasing r, except within approximately ∼0.2 R_d, where the trend reverses. Although the 84^th percentile values of both F_r and V_r are positive at all radii, the magnitudes at the 16^th percentile are substantially larger. Therefore, statistically speaking, the radial transport of cold gas across our sample is dominated by inflows at all radii.