elif factor[factor_id]["factorFunction"] == FUNC_DP_GEN_DEP_FIXING:
        # NB: this doesn't make sense for categoricals
        y_index = value if fmap[ftv_start]["vid"] == var_samp else \
            var_value[var_copy][fmap[ftv_start]["vid"]]
        l1_index = value if fmap[ftv_start + 1]["vid"] == var_samp else \