Solving a tridiagonal matrix in matlab using Thomas algorithm

Hello I have this tridiagonal matrix.

where r = 1/x, g= 1/x^2, s=ln(x)/x^2 and n represents the size.

I'm trying to solve this matrix in Matlab using the Thomas algorithm. I have found some online resources however they dont tend to deal with when n becomes very large, I need to solve matrices that are maybe 20 x 20 or 40 x 40 and so on.

Sorry for this vague description, I'm quite new to using matlab.

[Jan]

There is no "s" in the formula.

20x20 and 40x40 are not "large". The algorithms do not differ for small and large matrices.

Answer 1

[Steven Lord]

Is there a particular reason you need to solve this using that specific algorithm? Try using the normal backslash operator (\).