Exploring Art Data 14

If we save the data of Roger de Piles’ scores for artists to a csv file we can load them into R:

## Load the tab separated values for the table of artist scores
colClasses=c("character", "integer", "integer", "integer",
## Replace NA values with zero
nas<-which(is.na(scores), arr.ind=TRUE)
scores[nas[1], nas[2]]<-0
## Create the total score
scores<-cbind(scores, Total=apply(scores[2:5], 1, sum))

This allows us to find the lowest and highest scores:

## Min, max of each score
scoreMinMax<-function(scores, column){
cat(column, "\nMin (", lowest, "): ", sep="")
cat(scores$Painter[scores[column] == lowest], sep=", ")
cat("\nMax (", highest, "): ", sep="")
cat(scores$Painter[scores[column] == highest], sep=", ")
> scoreMinMax(scores, "Composition")
Min (0): Guido Reni, Gianfrancesco Penni
Max (18): Guercino, Rubens
> scoreMinMax(scores, "Drawing")
Min (6): Giovanni Bellini, Lucas van Leyden, Caravaggio, Palma il Vecchio, Rembrandt
Max (18): Raphael
> scoreMinMax(scores, "Colour")
Min (0): Pietro Testa
Max (18): Giorgione, Titian
> scoreMinMax(scores, "Expression")
Min (0): Jacopo Bassano, Giovanni Bellini, Caravaggio, Palma il Vecchio, Gianfrancesco Penni
Max (18): Raphael
> scoreMinMax(scores, "Total")
Min (23): Gianfrancesco Penni
Max (65): Raphael, Rubens

Cluster the artists:

## Clustering Utilities clustersNames<-function(clusters, names){ clusterCount<-length(clusters$size) clusters.works<-lapply(1:clusterCount, function(cluster){ names[clusters$cluster == cluster]}) } printClustersNames<-function(clustersNames){ clusterCount<-length(clustersNames) for(cluster in 1:clusterCount){ cat("Cluster", cluster, ":", paste(unlist(clustersNames[cluster]), collapse=", "), "\n\n") } } ## Cluster based on the numeric scores. 8 = 2x2x2 (Low/High) clusters<-kmeans(scores[2:5], 8) names<-clustersNames(clusters, scores$Painter) printClustersNames(names)

Cluster 1 : Correggio, Rembrandt, Van Dyck
Cluster 2 : Andrea del Sarto, Federico Barocci, Daniele da Volterra, Guercino, Lucas Jordaens, Giovanni Lanfranco, Otho Venius, Perin del Vaga, Primaticcio, Francesco Salviati, Taddeo Zuccari
Cluster 3 : Charles Le Brun, Il Domenichino, Giulio Romano, Leonardo da Vinci, Eustache Le Sueur
Cluster 4 : I Carracci, Raphael, Rubens, Vanius
Cluster 5 : Guido Reni, Gianfrancesco Penni
Cluster 6 : Jacopo Bassano, Giovanni Bellini, Caravaggio, Murillo, Palma il Vecchio
Cluster 7 : Sebastian Bourdon, Cavalier D'Arpino, Albrecht Dürer, Lucas van Leyden, Michelangelo, Il Parmigianino, Pietro Testa, Federico Zuccari
Cluster 8 : Abraham van Diepenbeeck, Giorgione, Giovanni da Udine, Holbein, Jacob Jordaens, Palma il Giovane, Sebastiano del Piombo, Teniers, Tintoretto, Titian, Veronese

And graph the scores:

## Stacked bar chart
## Allow room for names at bottom and legend at right
## 7 is from trial and error
par(xpd=T, mar=par()$mar+c(7,0,0,7))
barplot(t(as.matrix(scores[2:5])), names.arg=scores$Painter,
main="Roger de Piles' Ratings", col=rainbow(4), las=2, border=NA)
## Position legend in right margin
## 60 is from trial and error
legend(60, 60, names(scores[2:5]), fill=rainbow(5), cex=0.75)


Posted in Aesthetics, Art History, Art Open Data