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POError when loading a .shp file after joining attributes from a .csv to a .dbf file
 

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  1. POError when loading a .shp file after joining attributes from a .csv to a .dbf file
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    <p>I am having problems opening the .shp file in R after I have joined attributes from a csv file to the dbf file. I have a lot of experience coding in R, but limited experience with GIS in R. I have experience in ArcGIS, but do not have access to the program anymore. I know how to create bubbleplots and other maps in R using the csv file and plotting points, but I would like to be able to add the attributes to the .dbf, then use the shapefile to fill in the county areas with the brewer palette. I can open the shape file fine before joining the attributes to the .dbf file (the files were obtained from the us census bureau webpage).</p> <p>Here is my code below:</p> <pre><code>library(gpclib) library(maptools) library(RColorBrewer) library(classInt) library(TeachingDemos) gci&lt;-read.csv("C:/Users/Smackbug/marketingmapexample.csv", header=TRUE) #Has Geo_ID #read in dbf file to append data gci2&lt;-gci gci2&lt;-na.omit(gci2) #remove any empty data points #read in dbf file to add attributes akdbf&lt;-read.dbf(file.choose())#downloaded from the us census bureau #merge to join attributes joined&lt;-merge(akdbf,gci2, by=c("GEO_ID")) #Save original and new dbf write.dbf(akdbf, "C:/Users/Smackbug/Desktop/shapefiles/gz_2010_02_060_00_500koriginal.dbf") write.dbf(joined, "C:/Users/Smackbug/Desktop/shapefiles/gz_2010_02_060_00_500k.dbf") </code></pre> <p>and I get the error from this part of the code</p> <pre><code>**alaska&lt;-readShapePoly(file.choose(),proj4string=CRS("+proj=longlat") ) Error in `row.names&lt;-.data.frame`(`*tmp*`, value = value) : invalid 'row.names' length** </code></pre> <p>and the rest of the code</p> <pre><code>#the rest of the code should look something like this colors&lt;-brewer.pal(5,"Reds") brks&lt;-classIntervals(alaska$medianIncome, n=5, style="fixed", fixedBreaks=c(0,25,50,100,250)) plot(brks, pal=colors) brks&lt;-brks$brks plot(alaska, col=colors[findInterval(alaska$medianIncome, brks, all.inside=TRUE)], axes=F) </code></pre>
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