I have encountered the following problem:
- define a numerical function h with input x and output y
- use FindRoot to find the root x* of h
- one characteristic of h: at some part within h FindRoot is called
I have done that with other software, but its not working in Mathematica, or I am doing something wrong. I have attached a MWE.
Simply evaluating the function h works, but FindRoot does return many error messages. I really do not understand why.
Any ideas?
Best, Benjamin
h[inp_] :=
Module[{y, x, a, equ, sol, z},
a = inp;
equ = {x + .5 y - a[[1]], x + y - a[[2]]};
sol = FindRoot[equ, {{x, 1.0}, {y, 1.0}}];
z = {x, y} /. sol;
z - {1, 1}
]
XY = {X, Y};
XYval = {1.5, 2.0};
XYStart = {{XY[[1]], XYval[[1]]}, {XY[[2]], XYval[[2]]}};
h[XYval]
FindRoot[h[XYInput], XYStart]
Attachments:
