File list (Check if you may need any files):
direct method solve linear equation
...................................\Crout.m
...................................\Doolittle.m
...................................\GaussJordanXQ.m
...................................\GaussXQAllMain.m
...................................\GaussXQByOrder.m
...................................\GaussXQLineMain.m
...................................\InvAddSide.m
...................................\SymPos1.m
...................................\SymPos2.m
...................................\SymPos3.m
...................................\Yesf.m
...................................\conjgrad.m
...................................\followup.m
...................................\qrxq.m