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PONamespace issue with raster package plot function?
 

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  1. PONamespace issue with raster package plot function?
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    <p>I have experiencing a weird problem with the 'plot' function of the 'raster' package. </p> <pre><code>library(raster) ras &lt;- raster(ncol=10, nrow=10) </code></pre> <p>EDIT</p> <pre><code>values(ras) &lt;- runif(ncell(ras)) </code></pre> <p>END EDIT</p> <pre><code>plot(ras) Erreur dans as.double(y) : cannot coerce type 'S4' to vector of type 'double' </code></pre> <p>For what I have read on the net, this error depends on the user, and probably depends on the loaded packages. In my case, the problem comes from the fact that r uses the standard 'plot' method from the 'graphics' package, when it should use the specific 'raster' method since 'ras' is a rasterLayer object. However, for a reason I do not understand, 'plot' is not imported in the 'raster' namespace, while all the other functions are. </p> <pre><code>&gt; raster::plot Erreur : 'plot' n'est pas un objet exporté depuis 'namespace:raster' </code></pre> <p>To be compared with : </p> <pre><code>raster::persp standardGeneric for "persp" defined from package "graphics" function (x, ...) standardGeneric("persp") &lt;environment: 0x0cd9eb80&gt; Methods may be defined for arguments: x Use showMethods("persp") for currently available ones. </code></pre> <p>Since I do not completely understand how namespaces behave, I am looking for your help ! Is this kind of situation familiar for you, and do you have a way to solve it ? In the meantime, do you know a function to display the content of a namespace (so I could check the content of the raster namespace step by step) ?</p> <p>PS: I am using R 2.15.2 with RStudio, many packages loaded but all are up to date.</p> <pre><code>sessionInfo() R version 2.15.0 (2012-03-30) Platform: i386-pc-mingw32/i386 (32-bit) locale: [1] LC_COLLATE=French_Belgium.1252 LC_CTYPE=French_Belgium.1252 LC_MONETARY=French_Belgium.1252 LC_NUMERIC=C [5] LC_TIME=French_Belgium.1252 attached base packages: [1] stats graphics grDevices utils datasets methods base other attached packages: [1] raster_2.0-41 sp_1.0-5 loaded via a namespace (and not attached): [1] grid_2.15.0 hexbin_1.26.0 intervals_0.13.3 lattice_0.20-6 rgdal_0.8-4 spacetime_1.0-3 spam_0.29-2 tools_2.15.0 [9] xts_0.9-2 zoo_1.7-9 </code></pre> <p>Thanks you,</p> <p>François</p>
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    1. COI get a different error after the first three lines `Error in .plotraster2(x, col = col, maxpixels = maxpixels, add = add, : no values associated with this RasterLayer`. Use the example from the help and see if you can replicate your error.
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    2. COI get the same error as mnel...PS : you can use [this](http://stackoverflow.com/questions/13575180/how-to-change-the-language-of-errors-in-r) to have error message in English..
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    3. COYes, I forgot to fill the raster with numbers, sorry. Now it should work (or fail the same way it does for me).
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