Passing parameters to fsolve function - new syntax?

[Aivo Jürgenson]

Hello,

I have a function f(x,a,b,c), which I would like solve for variable x, so 
that f(x,a,b,c)=0, where a,b,c are parameters, which are known at the time 
of solving.

However, current fsolve function in Octave only supports one-variable 
functions. I suppose there is a work-around to declare specific global 
variables and then giving values to those variables before calling the 
fsolve function, but this doesn't seem to be a clean way of organizing 
this.

The fsolve FIX in the octave-forge package seems to expand this 
functionality, but I'm not able to compile it. Also, the status of this 
FIX seems to be unclear, as in the development mailing list message 
http://sourceforge.net/mailarchive/message.php?msg_id=11922522:

Paul Kienzle, in May, 2005:

> I have no interest in maintaining this function.  I am removing it from
> the build system for now, and will purge it completely if nobody steps
> forward to update it.
>
> IIRC, the purpose of this function is to pass extra arguments to
> fsolve, but we can do this now with the new syntax:
>
>         @(x) f(x,a,b,c)
>
> - Paul

Could somebody explain this new syntax? I would be happy to use this new 
and official way of passing extra arguments to fsolve, but I'm not been 
able to find any examples of doing it.

Aivo Jürgenson, address@hidden