trisolve¶

symbolic linear system solver

Calling Sequence¶

[x [,sexp]] = trisolve(A,b [,sexp])

:A,b matrices of strings :

symbolically solves A*x =b , A being assumed to be upper triangular.

sexp is a vector of common subexpressions in A, b, x.

A=['x','y';'0','z'];b=['0';'1'];
w=trisolve(A,b)
x=5;y=2;z=4;
`evstr`_(w)
`inv`_(`evstr`_(A))*`evstr`_(b)