Mon Feb 24 07:57:58 2020 

tridiagmatrix_test
  R version 3.4.4 (2018-03-15) 
  tridiagmatrix(A) solves a linear system with a tridiagonal matrix.

The lower diagonal L:

[1] 4 2 3

The diagonal D:

[1] 3 5 5 5

The upper diagonal U:

[1] 4 2 3

The right hand side b:

[1] 20 28 18 18

The computed solution x:

[1] 4 2 1 3

tridiagmatrix_test
  Normal end of execution.
Mon Feb 24 07:57:58 2020