MATLAB: I need program to LU decomposition of tridiagonal matrix

Question

How can help to a program LU decomposition of tridiagonal matrix

Answer 1

I find many instructions and even Matlab implementations, when I ask an internet search engine for "Matlab lu tridiagonal". E.g.:

• http://www.webpages.uidaho.edu/~barannyk/Teaching/LU_factorization_tridiagonal.pdf
• http://de.mathworks.com/matlabcentral/fileexchange/1359-fast-tridiagonal-system-solver
• http://www.sci.sdsu.edu/Faculty/Don.Short/math541/matlabcode.htm#TRIDIAGONAL

So my actual answer is a meta-message: Asking Google before posting is more efficient.