[Scilab-users] question non datafit

[Federico Miyara]

Samuel:

Oh, this is embarrasing... I did a web search on non-linear fit and 
somehow the top results always point at an outdated version (5.5.2) of 
Scilab's documentation. I wonder why

Thanks, the new documentation is much better!

Regerds,

Federico Miyara



On 04/04/2020 06:58, Samuel Gougeon wrote:
> Le 04/04/2020 à 09:26, Federico Miyara a écrit :
>>
>> Dear All,
>>
>> I'm trying to understand the function datafit.
>>
>> The documentation says:
>>
>>     datafit is used for fitting data to a model. For a given function
>>     G(p,z), this function finds the best vector of parameters p for
>>     approximating G(p,z_i)=0 for a set of measurement vectors z_i.
>>     Vector p is found by minimizing
>>     G(p,z_1)'WG(p,z_1)+G(p,z_2)'WG(p,z_2)+...+G(p,z_n)'WG(p,z_n)
>>
>>
>> I don't quite understand what is G(p,z_1)'WG(p,z_1). Are some product 
>> signs * missing? Shouldn't it be G(p,z_1)'*W*G(p,z_1)? Are these 
>> signs implied as in regular algebra notation?
>
>
> Hello Federico,
> Please see the documentation of the /latest/ scilab release:
> https://help.scilab.org/docs/6.1.0/en_US/datafit.html
> Regards
>
>
>
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