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<p>Greetings,</p>
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<p>I am new to SPCA analysis, and haven't used R that much either. I have 2 somewhat related questions:</p>
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<p>1) I read somewhere that lat and lon have to be converted to UTMs prior to analysis. I have a rather large spatial area (Iowa to Texas), so it spans 14R to 15T regions. I've looked at this page,
<a href="http://www.inside-r.org/packages/cran/PBSmapping/docs/convUL">http://www.inside-r.org/packages/cran/PBSmapping/docs/convUL</a> , and I'm wondering about the erroneous results and how this will work. Has anyone out there done SPCA with a large area?</p>
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<p>2) Additionally, I've tried to duplicate a set of data on a smaller scale (XY data is already in UTMs, alleles from 14 loci are in a .gen file), and when I am prompted to choose a network, I choose 7 (inverse distance, the locations are not evenly distributed).
I am prompted to choose an exponent and a minimum distance. I understand the exponent of 1, I think, but either my understanding of the min distance is wrong, or something else is producing this error:
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<p>error in if (any(x < 0)) stop("values in x cannot be negative") : missing value where TRUE/FALSE needed</p>
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<p>I have read through the tutorials for spca and adegenet, but clearly I'm still confused. Any help would appreciated!</p>
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<p><font size="3" face="Rockwell">Katherine S. Miller</font></p>
<p><font size="3" face="Rockwell">Ph.D. candidate</font></p>
<p><font size="3" face="Rockwell"></font> </p>
<p><font size="3" face="Rockwell">Caesar Kleberg Wildlife Research Institute</font></p>
<p><font size="3" face="Rockwell">Texas A&M University-Kingsville</font></p>
<p><font size="3" face="Rockwell">MSC 218, 700 University Blvd</font></p>
<p><font size="3" face="Rockwell">Kingsville, TX 78363</font></p>
<p><font size="3" face="Rockwell"></font> </p>
<p><font size="3" face="Rockwell">(361) 593-4486, office</font></p>
<p><font size="3" face="Rockwell"></font> </p>
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