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Thank you very much Wilfried,<br>
<br>
However,<br>
<br>
df = xyValues(muestra, loca)<br>
Error en .local(.Object, ...) : <br>
`C:/Documents and Settings/Manuel/Mis documentos/Manolo/Proyectos
en R/Análisis Espacial/cld6190_ann.asc' does not exist in the file
system,<br>
and is not recognised as a supported dataset name.<br>
<br>
<br>
Best,<br>
<br>
Manuel<br>
<br>
<br>
On 08/09/2010 10:53 p.m., Wilfried Thuiller wrote:
<blockquote
cite="mid:7D414DB3-296E-40B4-89FC-0FBE2E2E2C15@ujf-grenoble.fr"
type="cite">
<div>Because you need to use the raster function to load the
raster and not the readAsciiGrid. </div>
<div><br>
</div>
<div>muestra = raster("cld6190_ann.asc")<br>
<br>
loc = read.csv(file="bradypus.csv",head=TRUE,sep=",")<br>
loca = loc[,2:3]<br>
<br>
df = xyValues(muestra, loca)</div>
<div><br>
</div>
<div>The xyValues function works with raster object only</div>
<div><br>
</div>
<div><br>
</div>
<div><br>
</div>
<br>
<div>
<div>Le 9 sept. 2010 à 05:13, Manuel Spínola a écrit :</div>
<br class="Apple-interchange-newline">
<blockquote type="cite">
<div> Dear list members,<br>
<br>
I am trying to use xyValues to extract values from a raster
file:<br>
<br>
muestra = readAsciiGrid("cld6190_ann.asc")<br>
<br>
loc = read.csv(file="bradypus.csv",head=TRUE,sep=",")<br>
loca = loc[,2:3]<br>
<br>
df = xyValues(muestra, loca)<br>
Error en function (classes, fdef, mtable) :<br>
unable to find an inherited method for function "xyValues",
for signature "SpatialGridDataFrame", "data.frame"<br>
<br>
Why did I get the error message?<br>
<br>
Best,<br>
<br>
Manuel<br>
<br>
-- <br>
Manuel Spínola, Ph.D.<br>
Instituto Internacional en Conservación y Manejo de Vida
Silvestre<br>
Universidad Nacional<br>
Apartado 1350-3000<br>
Heredia<br>
COSTA RICA<br>
<a moz-do-not-send="true" href="mailto:mspinola@una.ac.cr">mspinola@una.ac.cr</a><br>
<a class="moz-txt-link-abbreviated" href="mailto:mspinola10@gmail.com">mspinola10@gmail.com</a><br>
Teléfono: (506) 2277-3598<br>
Fax: (506) 2237-7036<br>
<br>
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</blockquote>
</div>
<br>
<div>
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class="Apple-style-span" style="border-collapse: separate;
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<div style="word-wrap: break-word;">
<div><span class="Apple-style-span" style="font-size:
12px;">
<div>--------------------------</div>
<div>Dr. Wilfried Thuiller</div>
<div>Laboratoire d'Ecologie Alpine, UMR CNRS 5553</div>
<div>Université Joseph Fourier</div>
<div>BP53, 38041 Grenoble cedex 9, France</div>
<div>tel: +33 (0)4 76 51 44 97</div>
<div>fax: +33 (0)4 76 51 42 79</div>
<div><br>
</div>
<div>Email: <a moz-do-not-send="true"
href="mailto:wilfried.thuiller@ujf-grenoble.fr">wilfried.thuiller@ujf-grenoble.fr</a><br>
Home page: <a moz-do-not-send="true"
href="http://www.will.chez-alice.fr/">http://www.will.chez-alice.fr</a><br>
Website: <a moz-do-not-send="true"
href="http://www-leca.ujf-grenoble.fr/equipes/tde.htm">http://www-leca.ujf-grenoble.fr/equipes/tde.htm</a><br>
<br>
FP6 European MACIS project: <a
moz-do-not-send="true"
href="http://www.macis-project.net/">http://www.macis-project.net</a><br>
FP6 European EcoChange project: <a
moz-do-not-send="true"
href="http://www.ecochange-project.eu/">http://www.ecochange-project.eu</a></div>
<div><br>
</div>
</span></div>
</div>
</span><br class="Apple-interchange-newline">
</div>
<br class="Apple-interchange-newline">
<br class="Apple-interchange-newline">
</div>
<br>
</blockquote>
<br>
<br>
<pre class="moz-signature" cols="72">--
Manuel Spínola, Ph.D.
Instituto Internacional en Conservación y Manejo de Vida Silvestre
Universidad Nacional
Apartado 1350-3000
Heredia
COSTA RICA
<a class="moz-txt-link-abbreviated" href="mailto:mspinola@una.ac.cr">mspinola@una.ac.cr</a>
<a class="moz-txt-link-abbreviated" href="mailto:mspinola10@gmail.com">mspinola10@gmail.com</a>
Teléfono: (506) 2277-3598
Fax: (506) 2237-7036</pre>
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