change the label indicating the samples stage of origin. This function takes a pmwg samplers object, a set of indices corresponding to the samples you wish to relabel and two arguments detailing to expected value for the current stage (default “burn”) and the stage to would like to relabel the samples to (default “adapt”). The goal for the function is to take samples generated in a burn in stage that after visualising appear to have successfully converged around the posterior and make them available