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POPlotting a map with lines density in place of colours in R: legend and lines
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copied!<p>I have data about relative productivity for the Italian provinces. I built 5 groups according to the productivity level. Finally I want to represent such a scenario using a map of the Italian provinces, given that I CAN NOT use colours, since the printing of the map will be in a scale grey. I used the following:</p> <pre><code>library(spdep) library(spectralGP) library(maptools) library(gstat) library (RColorBrewer) plot(submap.a,col="beige",border="Black",axes=T, xlim=c(7,20), ylim=c(36,48)) plot(submap.b,col="darkgrey",border="Black",add=T) plot(submap.c,col="black",border="Black",add=T,density=24) plot(submap.d, col="grey30",border="Black",add=T) plot(submap.e,col="grey13",border="Black", add=T) </code></pre> <p>where, for simplicity, the five groups are a,b,c,d,e</p> <p>The result is here <a href="http://s9.postimg.org/m5co5g3nz/Rplot.png" rel="nofollow">http://s9.postimg.org/m5co5g3nz/Rplot.png</a></p> <p>I d like to do 2 more things I was not able to figure out.</p> <p>First I need to add the legend, I tried with</p> <pre><code>legend_map <- c("a", "b","c", "d", "e") legend(17,47,legend=legend_map,fill=c("white","darkgrey", ??,"grey30","grey13"),bty="n",cex=0.6) </code></pre> <p>I am not able to find a way to insert a code for group (c) in place of the ??. I tried with </p> <pre><code>"black"[density=24] "black"$density=24 </code></pre> <p>but they dont work</p> <p>Secondly, for things look clearer, I may want to fill group (e) provinces with the same style of group (c) but with lines going to the inverse direction or even vertically. Even in this case I was not able to deal with it.</p> <p>Thank you</p>

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