On Monday, January 28, 2013 1:24:26 AM UTC-6, =C5 er=C3=BDch Jakub wrote: > Dear comunity, > > I'm trying to play around with the simple matrixes in Mathematica for the first time and I have beginners question: > > > > Does Mathematica have a function, which makes the intermediate step of Gaussian elimination to produce just eliminated upper triangular matrix? Function UpperTriangular only cuts the lower triangular places off (which is not what I need) and RowReduce makes the completely reduced echelon form of matrix. > > I needed the step in the middle of the RowReduce way. > > > > Thanks in advance for any tips > > > > Jakub
LUDecomposition will give, among other things, the upper triangular part. Note that it does pivoting so any usage of the result would need to take that into account.