Results of applying the LSD (green curve) and Bayesian LSD (blue curve showing the mean and blue regions showing the credibility intervals) to observations of II Peg, both for Stokes I (left panel) and V (right panel). The experiments use the Matérn covariance function with ν = 3 / 2. The green and blue curves overlap almost exactly in the left panel when increasing the number of considered spectral lines.