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

> base::assign(".ptime", proc.time(), pos = "CheckExEnv")
> ### Name: POIcoords<-
> ### Title: Update POI slots
> ### Aliases: POIcoords<-
> 
> ### ** Examples
> 
>    ## IRIS Example
>    data(iris)
>    
>    # distance of each element to each dimension max and min
>    matrizSim = cbind(
+                1 - (max(iris[,1]) - iris[,1]) / (max(max(iris[,1]) - iris[,1])),
+                1 - (max(iris[,2]) - iris[,2]) / (max(max(iris[,2]) - iris[,2])),
+                1 - (max(iris[,3]) - iris[,3]) / (max(max(iris[,3]) - iris[,3])),
+                1 - (max(iris[,4]) - iris[,4]) / (max(max(iris[,4]) - iris[,4])),
+ 
+                1 - (min(iris[,1]) - iris[,1]) / (min(min(iris[,1]) - iris[,1])),
+                1 - (min(iris[,2]) - iris[,2]) / (min(min(iris[,2]) - iris[,2])),
+                1 - (min(iris[,3]) - iris[,3]) / (min(min(iris[,3]) - iris[,3])),
+                1 - (min(iris[,4]) - iris[,4]) / (min(min(iris[,4]) - iris[,4])))
> 
>    # exaggerate diffs
>    matrizSim  = matrizSim^3 
>    
>    # Create POI plot
>    irisPOI = POICreate('POI')
>    irisPOI@matrizSim <- matrizSim
>    irisPOI@wordsInQuery <- c('high.Sepal.Length', 'high.Sepal.Width', 'high.Petal.Length', 'high.Petal.Width',
+                              'low.Sepal.Length', 'low.Sepal.Width', 'low.Petal.Length', 'low.Petal.Width')
>    POIcoords(irisPOI) <- POICalc(irisPOI ,length(irisPOI@wordsInQuery))
>    irisPOI@docs <- cbind(matrix(seq(1:nrow(irisPOI@objeto))),matrix(seq(1:nrow(irisPOI@objeto))))
>    irisPOI@colores <- c(rep(2,50),rep(3,50),rep(4,50))
>    try(rm('POI.env'), silent = T)
Warning in rm("POI.env") : object 'POI.env' not found
>    plotPOI(irisPOI)
Error in text.default(objetoC[, 1], objetoC[, 2], labels = etiq2, cex = cgnsphrFont -  : 
  X11 font -*-helvetica-%s-%s-*-*-%d-*-*-*-*-*-*-*, face 1 at size 2 could not be loaded
Error in structure(.External(.C_dotTcl, ...), class = "tclObj") : 
  [tcl] image type "Rplot" doesn't exist.
Calls: plotPOI -> tkrplot -> .Tcl -> structure
Execution halted