leasqr help

[Sergei Steshenko]

--- Francesco Potorti` <Potorti at isti.cnr.it> wrote:

> As far as I can understand, leasqr should have no
> problems minimising the sum of any distance, if properly modified, and
> the modifications would be minimal, as I suggested in my previous mails.
> 

I learned this stuff many years ago, but I think least squares solvers are based
on the fact that the sum of distances is the some of squares.

I think that based on this fact the problem becomes the one of solving linear equations
system, and that is done by applying derivative to the some of squares. I mean, applying
derivatives produces the linear equations system to be solved.

So, I do not think that for other than least squares target minimization modifications
will be minimal.

Regards,
  Sergei.


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