symbolic linear system solver
[x [,sexp]] = trisolve(A,b [,sexp])
matrices of strings
symbolically solves A*x =b , A being assumed to be upper triangular.
A*x =b
A
sexp is a vector of common subexpressions in A, b, x.
sexp
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)