Re: leasqr error

[Martin Helm]

I can see that problem when I (as your error message indicates) load the
control package and the optim package, it does not happen when I only do a

pkg load optim

and do not load control in parallel, this looks as if they contain
conflicting options functions.

octave:1> pkg load optim
octave:2> x=linspace(0, 5);
octave:3> y = 1./(1 + 1.2*x.^(1.8)) + randn(1,100)*0.03;
octave:4> function y = ffun(x, p)
> y = 1./(1+p(1)*x.^p(2));
> endfunction
octave:5> p = [0.5 0.0];
octave:6> [yfit pfit cvg iter] = leasqr(x, y, p, "ffun");
octave:7> cvg, iter, pfit
cvg =  1
iter =  6
pfit =

   1.1887
   1.8186

if your control package is set to autoload explicitly unload it and try
again.

pkg unload control
pkg load optim
x=linspace(0, 5);
y = 1./(1 + 1.2*x.^(1.8)) + randn(1,100)*0.03;
function y = ffun(x, p)
y = 1./(1+p(1)*x.^p(2));
endfunction
p = [0.5 0.0];
[yfit pfit cvg iter] = leasqr(x, y, p, "ffun");
cvg, iter, pfit