<div dir="ltr"><div><br><br></div>As I understand GRASS can handle both conditions (i.e. the number of clusters (through the parameter classes) and "iterations" as the criteria to converge. The algorithm will stop as soon as any of the conditions are met first.    <br><br><a href="https://grass.osgeo.org/grass64/manuals/i.cluster.html">https://grass.osgeo.org/grass64/manuals/i.cluster.html</a><br><div class="gmail_extra"><br><div class="gmail_quote">On Thu, Nov 26, 2015 at 1:03 PM, Michael Barton <span dir="ltr"><<a href="mailto:Michael.Barton@asu.edu" target="_blank">Michael.Barton@asu.edu</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex">



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I'm trying out GRASS's unsupervised classification functions. As I understand it, it is a 2 step process. 
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<div>1. run i.cluster to get cluster signatures</div>
<div>2. run i.maxlik using the cluster signatures to generate the spatial clusters</div>
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<div>I've varied the parameters several times, and AFAICT, setting the initial number of clusters also determines the final number. In other unsupervised clustering routines I've used, this is not the case. Because the clustering iterates until the
 convergence value is reached, the final number of clusters can be different from the initial number. Can anyone offer insight on this for GRASS?</div>
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<div>Thanks</div>
<div>Michael<br>
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<font size="3" face="Helvetica">C. Michael Barton</font></div>
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<font size="3" face="Helvetica">Director, Center for Social Dynamics & Complexity </font></div>
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<font size="3" face="Helvetica">Professor of Anthropology, School of Human Evolution & Social Change</font></div>
<div><font size="3" face="Helvetica">Head, Graduate Faculty in Complex Adaptive Systems Science</font></div>
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<font size="3" face="Helvetica">Arizona State University</font></div>
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<font size="3" face="Helvetica"><font>voice:  </font><font><a href="tel:480-965-6262" value="+14809656262" target="_blank">480-965-6262</a> (SHESC), <a href="tel:480-965-8130" value="+14809658130" target="_blank">480-965-8130</a>/727-9746 (CSDC)</font><br>
<font>fax: <a href="tel:480-965-7671" value="+14809657671" target="_blank">480-965-7671</a> (SHESC),  <a href="tel:480-727-0709" value="+14807270709" target="_blank">480-727-0709</a> (CSDC)</font><br>
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<font size="3" face="Helvetica">www: <a href="http://www.public.asu.edu/~cmbarton" target="_blank">
http://www.public.asu.edu/~cmbarton</a>, <a href="http://csdc.asu.edu" target="_blank">http://csdc.asu.edu</a></font></div>
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