Running examples in ‘MTA-Ex.R’ failed
The error most likely occurred in:

> base::assign(".ptime", proc.time(), pos = "CheckExEnv")
> ### Name: gdev
> ### Title: General Deviation
> ### Aliases: gdev
> 
> ### ** Examples
> 
> # load data
> data("GrandParisMetropole")
> # compute absolute global deviation
> com$gdevabs <- gdev(x = com, var1 = "INC", var2 = "TH", type = "abs")
> # compute relative global deviation
> com$gdevrel <- gdev(x = com, var1 = "INC", var2 = "TH", type = "rel")
> 
> # Deviations maps
> if(require('cartography')){
+   # set graphical parameters
+   par(mar = c(0,0,1.2,0))
+   # set breaks
+   bks <- c(min(com$gdevrel),50,75,100,125,150,max(com$gdevrel))
+   cols <- carto.pal(pal1 = "blue.pal", n1 = 3,
+                     pal2 = "wine.pal", n2 = 3)
+   # plot a choropleth map of the relative global deviation
+   choroLayer(spdf = com.spdf, df = com, var = "gdevrel",
+              legend.pos = "topleft",
+              legend.title.txt = "Relative Deviation",
+              breaks = bks, border = NA,
+              col = cols)
+   # add symbols proportional to the absolute general deviation
+   com$sign <- ifelse(test = com$gdevabs<0, yes = "negative", no = "positive")
+   propSymbolsTypoLayer(spdf = com.spdf, df = com, var = "gdevabs",var2 = "sign",
+                        legend.var.pos = "left",legend.values.rnd = -2, 
+                        legend.var2.values.order = c("positive", "negative"),
+                        legend.var.title.txt = "Absolute Deviation",
+                        col = c("#ff000050","#0000ff50"),legend.var2.pos = "n",
+                        legend.var.style = "e", inches = 0.2)
+   # add EPT boundaries
+   plot(ept.spdf, add=TRUE)
+   # add a layout
+   layoutLayer(title = "General Deviation (reference: Grand Paris Metropole)",
+               sources = "GEOFLA® 2015 v2.1, Apur, impots.gouv.fr", 
+               north = TRUE,
+               author = "MTA")
+ }
Loading required package: cartography
Error in as.double(y) : 
  cannot coerce type 'S4' to vector of type 'double'
Calls: plot -> plot.default -> xy.coords
Execution halted