MATLAB code for LU decomposition of an arbitrary matrix.

how do i make a code for LU decomposition of an arbitrary matrix with out using inv( )

function or \ ?? The code must display L, U and L*U matrices. The code must accept a matrix as

an input. The code must generate the following error message if the input is not a square matrix:

“The input matrix must be square.”

im trying to make a code for these problems.

10x1+2x2-x3=27

-3x1-6x2+2x3=-61.5

x1+x2+5x3=-21.5

Answer 1

[Ameer Hamza]

"with out using inv( ) function or \"

https://www.mathworks.com/help/releases/R2020a/matlab/ref/lu.html

If you want to write you own code from scratch, then study the algorithm and code in these FEX submissions:

https://www.mathworks.com/matlabcentral/fileexchange/7779-lu-factorization-by-doolittle-s-method

https://www.mathworks.com/matlabcentral/fileexchange/26775-lu-decomposition

https://www.mathworks.com/matlabcentral/fileexchange/59077-lu-factorization-algorithm