Map each reference-sample block to its column indices in Xc
multi_raking_block_cols(Xc, Xp_list, label = "Multi_Calibration")A list of integer vectors, one per element of `Xp_list`, giving the column positions in `Xc` that correspond to the columns of each `Xp_list[[j]]`.
Numeric design matrix for the nonprobability sample, with named columns.
List of reference-sample design matrices, each with named columns that are a subset of `colnames(Xc)`.
Character scalar used as a prefix in error messages.