Is there a parametric version of fsolve?

[John W. Eaton]

On  2-Mar-1997, Craig Earls <address@hidden> wrote:

| I have a multivariable function:
| 
| x=foo(r,s,t)
| 
| give r and s how can I can find t such that x=0. The order of the
| arguments is not important, but I need to vary the other parameters so
| hard coding them in and using fsolve is very inconvenient. Ideally what
| I would like is something like fsolve, but with extraparameters:
| 
| fsolve("foo",r,3,5)
| 
| where 3 and 5 get passed throught to foo, and r is varied to find zero.
| I am starting to hack fsolve.cc to do this but that looks like a steep
| climb for a short project, is ther a better way already extant?

Global variables?

  function foo (r, s, t)
    ...
  endfunction

  global s = 3;
  global t = 5;
  
  function fsolve_foo (x)

    global s;
    global t;

    foo (x, s, t);

  endfunction

  fsolve ("fsolve_foo", r0)


jwe