prac7.asv prac7.m prac7ej4.asv prac7ej4.m prac7ej4_b.asv prac7ej4_b.m pract7.pdf umbral_dct.asv umbral_dct.m filtro_no_lineal.m hs_err_pid728.log hs_err_pid824.log hs_err_pid1428.log hs_err_pid3740.log hs_err_pid3796.log hs_err_pid3892.log