Regression\liti11.m ..........\liti12.m ..........\liti21.m ..........\liti22.m ..........\liti23.m ..........\liti31.m ..........\liti32.m ..........\liti41.m ..........\liti42.m ..........\liti51.m ..........\liti52.m ..........\liti6.m ..........\model.m ..........\volum.m Regression