<html><body><div>Hi again,</div><div>Thanks, sorry about that - here is the code to illustrate what I did - following the ASDAR book example of choosing a subset of coordinates in Brazil:</div><div><br></div><div><div>> brazil</div><div>[1] 4 5 6 7 8</div><div>> coordinates(CRAN_sp[brazil, ])</div><div> coords.x1 coords.x2</div><div>4 -49.26667 -25.41667</div><div>5 -42.86667 -20.75000</div><div>6 -43.20000 -22.90000</div><div>7 -47.63333 -22.71667</div><div>8 -46.63333 -23.53333</div><div>> summary(CRAN_sp[brazil, ])</div><div>Object of class SpatialPoints</div><div>Coordinates:</div><div> min max</div><div>coords.x1 -122.95000 153.0333</div><div>coords.x2 -37.81667 57.0500</div><div>Is projected: FALSE </div><div>proj4string : [+proj=longlat +ellps=WGS84]</div><div>Number of points: 5</div><div><br></div><div>> summary(CRAN_sp)</div><div>Object of class SpatialPoints</div><div>Coordinates:</div><div> min max</div><div>coords.x1 -122.95000 153.0333</div><div>coords.x2 -37.81667 57.0500</div><div>Is projected: FALSE </div><div>proj4string : [+proj=longlat +ellps=WGS84]</div><div>Number of points: 54</div></div><div><br></div><div> </div><div>My problem is: the object "brazil" should have a new bounding box -- as it does in the ASDAR book example text. But when I do it, the bounding box remains identical to the original one for CRAN_sp.</div><div>Sorry for the confusion, thanks greatly for any help.</div><div>Robin</div><div><br></div><div><br></div><div><br>Begin forwarded message:<br><br></div><div><blockquote type="cite"><span style="color: #000000;" _mce_style="color: #000000;"><b>From: </b></span><span>Tom Gottfried <tom.gottfried@wzw.tum.de></span><br><span style="color: #000000;" _mce_style="color: #000000;"><b>Date: </b></span><span>February 28, 2011 1:05:21 PM</span><br><span style="color: #000000;" _mce_style="color: #000000;"><b>To: </b></span><span>r-sig-geo@r-project.org</span><br><span style="color: #000000;" _mce_style="color: #000000;"><b>Subject: </b></span><span><b>Re: [R-sig-Geo] extracting coordinates</b></span><br><br><div class="msg-quote"><div class="_stretch">Hi Robin,<br>
<br>
could you please post some example code (possibly self-contained, e.g. with meuse data)?<br>
So it's less guessing what you actually did. More on this topic:<br>
<a href="http://www.r-project.org/posting-guide.html" _mce_href="http://www.r-project.org/posting-guide.html">http://www.r-project.org/posting-guide.html</a><br>
<br>
regards,<br>
Tom<br>
<br>
Am 28.02.2011 16:59, schrieb Robin W Hunnewell:<br>
> Hi,<br>
> <br>
> I'm going through some initial data inspection, and working through<br>
> steps in the "Applied Spatial Data analysis with R" book. <br>
> Following steps in Ch. 2 of the "Applied Spatial Data analysis with R"<br>
> book, I was able to extract a set of coordinates from my<br>
> SpatialPoints object just fine. The object returned looks right - the<br>
> coordinates are extracted correctly, but my bounding box does <br>
> not change. The same min/max for coords.x1 and x2 get returned instead<br>
> of a new bounding box that reflects the selection.<br>
> <br>
> Not sure what I'm missing, would appreciate any help - I apologize if<br>
> this is overly simple!<br>
> thanks,<br>
> Robin<br>
> <br>
> <br>
> <br>
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