<html><body><div style="color:#000; background-color:#fff; font-family:times new roman, new york, times, serif;font-size:18pt"><div><span>Dear Damien,</span></div><div style="color: rgb(0, 0, 0); font-size: 24px; font-family: 'times new roman', 'new york', times, serif; background-color: transparent; font-style: normal; "><span><br></span></div><div style="color: rgb(0, 0, 0); font-size: 24px; font-family: 'times new roman', 'new york', times, serif; background-color: transparent; font-style: normal; "><span>This is a good solution, thank you! </span></div><div style="color: rgb(0, 0, 0); font-size: 24px; font-family: 'times new roman', 'new york', times, serif; background-color: transparent; font-style: normal; "><span><br></span></div><div style="color: rgb(0, 0, 0); font-size: 24px; font-family: 'times new roman', 'new york', times, serif; background-color: transparent; font-style: normal;
"><span>Cheers,</span></div><div></div><div> </div><div>Pablo Riul<br><br>Departamento de Engenharia e Meio Ambiente<br>Centro de Ciências Aplicadas e Educação<br>Universidade Federal da Paraíba - Campus IV<br>R: Mangueira s/n, Centro CEP: 58.297-000<br>Rio Tinto - Paraíba - Brasil</div><div><br></div> <div style="font-size: 18pt; font-family: 'times new roman', 'new york', times, serif; "> <div style="font-size: 12pt; font-family: 'times new roman', 'new york', times, serif; "> <div dir="ltr"> <font size="2" face="Arial"> <hr size="1"> <b><span style="font-weight:bold;">De:</span></b> Damien Georges <damien.georges2@gmail.com><br> <b><span style="font-weight: bold;">Para:</span></b> Pablo Riul <pabloriul@yahoo.com.br> <br><b><span style="font-weight: bold;">Cc:</span></b> "biomod-commits@lists.r-forge.r-project.org" <biomod-commits@lists.r-forge.r-project.org> <br> <b><span style="font-weight: bold;">Enviadas:</span></b>
Quinta-feira, 22 de Novembro de 2012 6:52<br> <b><span style="font-weight: bold;">Assunto:</span></b> Re: [Biomod-commits] Help on variable importance<br> </font> </div> <br><div id="yiv1803712465">
<div>
<div class="yiv1803712465moz-cite-prefix">Dear Pablo,<br>
<br>
As you said, upper a variables importance score is, more effect
the variable have (for the studied model).<br>
The value returned is dependent from considered algorithm. I am
not aware of any kind of consensus threshold to determine if a
variable must be considered as important or not.. And I think it
would not be fair to do it.<br>
<br>
I guess the best, and the safest, way to interpret variables
importance is to consider them relatively.. You can rank your
variables by scores and say : for this model, this variable is
more important than this other...<br>
<br>
Cheers,<br>
<br>
Damien.<br>
<br>
On 21/11/2012 21:31, Pablo Riul wrote:<br>
</div>
<blockquote type="cite">
<div style="color: rgb(0, 0, 0); background-color: rgb(255, 255, 255); font-size: 18pt; font-family: 'times new roman', 'new york', times, serif; ">
<div style="font-size: 18pt; font-family: 'times new roman', 'new york', times, serif; "><span>Dear list,</span></div>
<div style="color: rgb(0, 0, 0); font-size: 24px; background-color: transparent; font-style: normal; font-family: 'times new roman', 'new york', times, serif; "><span><br>
</span></div>
<div style="background-color:transparent;"><font class="yiv1803712465Apple-style-span" size="5" face="'times new roman',
'new york', times, serif">Is there any threshold to consider
a predictor as an important variable? I understand the
importance is the result of one minus the correlation
between the original prediction and the prediction with the
permuted variable. And higher the value higher the
importance. But an reference value would be useful. Does
anybody have any suggestion?</font></div>
<div style="color: rgb(0, 0, 0); font-size: 24px; background-color: transparent; font-style: normal; font-family: 'times new roman', 'new york', times, serif; "><font class="yiv1803712465Apple-style-span" size="5" face="'times new roman',
'new york', times, serif"><br>
</font></div>
<div style="color: rgb(0, 0, 0); font-size: 24px; background-color: transparent; font-style: normal; font-family: 'times new roman', 'new york', times, serif; "><font class="yiv1803712465Apple-style-span" size="5" face="'times new roman',
'new york', times, serif">Cheers,</font></div>
<div style="font-size: 18pt; font-family: 'times new roman', 'new york', times, serif; "> </div>
<div style="font-size: 18pt; font-family: 'times new roman', 'new york', times, serif; ">Pablo Riul<br>
<br>
Departamento de Engenharia e Meio Ambiente<br>
Centro de Ciências Aplicadas e Educação<br>
Universidade Federal da Paraíba - Campus IV<br>
R: Mangueira s/n, Centro CEP: 58.297-000<br>
Rio Tinto - Paraíba - Brasil</div>
</div>
<br>
<fieldset class="yiv1803712465mimeAttachmentHeader"></fieldset>
<br>
<pre>_______________________________________________
Biomod-commits mailing list
<a rel="nofollow" class="yiv1803712465moz-txt-link-abbreviated" ymailto="mailto:Biomod-commits@lists.r-forge.r-project.org" target="_blank" href="mailto:Biomod-commits@lists.r-forge.r-project.org">Biomod-commits@lists.r-forge.r-project.org</a>
<a rel="nofollow" class="yiv1803712465moz-txt-link-freetext" target="_blank" href="https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/biomod-commits">https://lists.r-forge.r-project.org/cgi-bin/mailman/listinfo/biomod-commits</a></pre>
</blockquote>
<br>
</div>
</div><br><br> </div> </div> </div></body></html>