Solve a linar system A*x=b with function

Hi

Can i use function to solve a linear system A*x=b ,knowin g that A has a tridiagonal form with a variables coefficients (not constants)?

i used this function V=Tridiag(p,q,r,s); for a constatant coefficients of A and it works very well. i ask if can i use the same method for a variables coefficients?

[John D'Errico]

Tridiag
Undefined function or variable 'Tridiag'. 
>> help Tridiag

Tridiag not found.

Use the Help browser search field to search the documentation, or
type "help help" for help command options, such as help for methods.

So only you know if Tridiag will work, since it was you who seems to have either written it, or found it someplace online. It is not supplied as part of MATLAB. We have no crystal ball to know what it is or what it does.

[the cyclist]

Do you mean tridiag from the File Exchange?

If so, I guess you could try asking the author of that function.