yorick banner




Global Index


Quick Reference

functions in matrix.i - T


             TDsolve(c, d, e, b)  
          or TDsolve(c, d, e, b, which=which)  
     returns the solution to the tridiagonal system:  
        D(1)*x(1)       + E(1)*x(2)                       = B(1)  
        C(1:-1)*x(1:-2) + D(2:-1)*x(2:-1) + E(2:0)*x(3:0) = B(2:-1)  
                          C(0)*x(-1)      + D(0)*x(0)     = B(0)  
     (i.e.- C is the subdiagonal, D the diagonal, and E the superdiagonal;  
     C and E have one fewer element than D, which is the same length as  
     both B and x)  
     B may have additional dimensions, in which case the returned x  
     will have the same additional dimensions.  The WHICH dimension of B,  
     and of the returned x is the one of length n which participates  
     in the matrix solve.  By default, WHICH=1, so that the equations  
     being solved involve B(,..) and x(+,..).  
     Non-positive WHICH counts from the final dimension (as for the  
     sort and transpose functions), so that WHICH=0 involves B(..,)  
     and x(..,+).  
     The C, D, and E arguments may be either scalars or vectors; they  
     will be broadcast as appropriate.  
interpreted function, defined at i0/matrix.i   line 36  
SEE ALSO: LUsolve,   QRsolve,   SVsolve,   SVdec