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POProblem creating bioclimatic variables using dismo packages
 

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  1. POProblem creating bioclimatic variables using dismo packages
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    <p>I would like to get all the bioclimatic variables of future scenarios for species distribution modelling. So I run the "biovars" function in "dismo" packages using the three variables from worldclim database, and I got a RasterBrick of 12 layers:</p> <pre><code>&gt;prec&lt;-stack(paste(getwd(),"/prec_2080/wc_2_5m_HADCM3_B2a_2080_prec_",1:12,".bil",sep="")) &gt;tmin&lt;-stack(paste(getwd(),"/tmin_2080/wc_2_5m_HADCM3_B2a_2080_tmin_",1:12,".bil",sep="")) &gt;tmax&lt;-stack(paste(getwd(),"/tmax_2080/wc_2_5m_HADCM3_B2a_2080_tmax_",1:12,".bil",sep="")) &gt;x&lt;-biovars(prec=prec,tmin=tmin,tmax=tmax) &gt; x class : RasterBrick dimensions : 3600, 8640, 12 (nrow, ncol, nlayers) resolution : 0.04166667, 0.04166667 (x, y) extent : -180, 180, -60, 90 (xmin, xmax, ymin, ymax) projection : NA values : C:/DOCUME~1/Marco/LOCALS~1/TMP/R_raster_tmp/raster_tmp_8984740455.grd min values : 42 -65458 -1017 0 71 0 -65439 22 23 56 ... max values : 65456 213 1 34159 65534 65513 65534 65507 65503 65518 ... </code></pre> <p>However, I thought there should be 19 bioclim variables. As you mentioned that there are more arguments in biovars except the there, but I do not know what they are. Could you help me out?</p> <p>Another problem of this is that I got error writing these variables:</p> <pre><code>&gt;writeRaster(x,paste(getwd(),"/wc_2_5m_HADCM3_B2a_2080_1.grd",sep="")) Error in dim(res) &lt;- c(ncols, raster@data@nlayers * nrows) : dims [product 933120] do not match the length of object [889920] </code></pre> <p>and, when I tried to write them band by band, I got the following error:</p> <pre><code>&gt;for (i in 10:12) { &gt;writeRaster(x[[i]],paste(getwd(),"/wc_2_5m_HADCM3_B2a_2080_",i,".grd",sep=""),overwrite=TRUE) } Error in result[, i] &lt;- readBin(raster@file@con, what = dtype, n = ncols, : replacement has length zero </code></pre> <p>The three input variables have the same dimensions, e.g.:</p> <pre><code>&gt; prec class : RasterStack dimensions : 3600, 8640, 12 (nrow, ncol, nlayers) resolution : 0.04166667, 0.04166667 (x, y) extent : -180, 180, -60, 90 (xmin, xmax, ymin, ymax) projection : NA min values : 0 0 0 0 0 0 0 0 0 0 ... max values : 65535 65535 65535 65535 65535 65535 65535 65535 65535 65535 ... </code></pre> <p>Could anybody explain why? Thanks in advance~</p>
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    1. USRaffael
    1. USMarco
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    1. COYou might do better to post this on the R-sig-ecology list as this isn't really a programming Q and is quite a niche area of use for R. https://stat.ethz.ch/mailman/listinfo/r-sig-ecology
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      1. POProblem creating bioclimatic variables using dismo packages
      1. USGavin Simpson
    2. COThanks for the suggestion! Actually, I already posted to Prof. Hijmans, but still get no answer now. Probably he is quite busy, so, I will wait for some more time.
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      1. USMarco
 

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