<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<div class="moz-cite-prefix">Le 04/04/2020 à 09:26, Federico Miyara
a écrit :<br>
</div>
<blockquote type="cite"
cite="mid:db183ddb-7688-00f2-f48a-cb93c5d7a4a0@fceia.unr.edu.ar">
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
<br>
<font face="Courier New">Dear All,<br>
<br>
I'm trying to understand the function datafit.<br>
<br>
The documentation says:<br>
<br>
</font>
<blockquote><font face="Courier New">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)</font><br>
</blockquote>
<font face="Courier New"><br>
I don't quite understand what is </font><font face="Courier
New"><font face="Courier New">G(p,z_1)'WG(p,z_1). Are some
product signs * missing? Shouldn't it be </font></font><font
face="Courier New"><font face="Courier New"><font face="Courier
New">G(p,z_1)'*W*G(p,z_1)?</font></font> Are these signs
implied as in regular algebra notation?<br>
</font></blockquote>
<p><br>
</p>
<p>Hello Federico,<br>
Please see the documentation of the <i>latest</i> scilab release:<br>
<a class="moz-txt-link-freetext" href="https://help.scilab.org/docs/6.1.0/en_US/datafit.html">https://help.scilab.org/docs/6.1.0/en_US/datafit.html</a><br>
Regards</p>
<p><br>
</p>
</body>
</html>