Posted by shimmyshack on 09/06/07 17:24

On Sep 6, 4:01 pm, "saud...@googlemail.com" <saud...@googlemail.com>
wrote:
> Hi php pros,
>
> I have an array containing n numbers and want to fit them to e.g. a
> polynomial function f(x), x=1...n.
>
> Is there a php script / library for doing that?
>
> I basically wish to do curve fitting to my data array, directly in
> php.
>
> Ideal would be something like polyfit in MatLab.
> One possibility would be to involve a c++ program doing the data
> fitting. Export the array as a dump file from php, execute the
> compiled c++ polynomial fitting file program calling the dump file and
> saving the result, and then open the result file in php. Thats of
> course not so elegant ...
>
> Thanks for any help.
>
> Best
>
> -saudepp

there are COM objects (sold) which you can invoke from within PHP,
other than that, writing your own spline model seems a challenge just
to avoid the inelegance of using an existing c++ program.
dont reinvent the wheel eh!
by f(x) do you mean a cubic polynomial?

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