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<div class="moz-cite-prefix">Le 25/09/2016 01:02, Fukashiimo a
écrit :<br>
</div>
<blockquote
cite="mid:y8wl34yx9v4k19j6d316ba3s.1474758151853@email.android.com"
type="cite">Thank you for your advice. y and u have some
correration. X in your equation is the Laplace operator, In this
case, how I can use datafit?<br>
</blockquote>
.<br>
AFAIK, there is no way in Scilab to perform a formal fit.<br>
This is why i asked about known values of u, s or both.<br>
<pre wrap="">>Object function: Min ( (y-ymodel)<sup class="moz-txt-sup"><span style="display:inline-block;width:0;height:0;overflow:hidden">^</span>2</sup>)
</pre>
So you need to know/have some y = y_actual(s,u) values for given s
and u pairs.<br>
Which are the known data?<br>
Do you have a y_actual surface known for a (s,u) fixed mesh?<br>
<br>
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