library(ggplot2) d <- read.table("perf.dat", header=TRUE, fill=TRUE) listOPs <- c("acceder", "remplir", "supprimer") listStructs <- c("arraylist", "hashmap", "vector") for (operation in listOPs) { #for (struct in listStructs) { ggplot(d[d$Operation == operation ,], aes(x=n, y=Temps, color=Structure)) + geom_point() + geom_smooth() + ggtitle(operation) + xlab("Nombre d'éléments") + ylab("Temps d'exécution") + theme(plot.title = element_text(hjust = 0.5)) + facet_grid(Operation ~ Structure) #ylim(0, max(d$temps, na.rm = TRUE)) ggsave(paste(operation, ".png", sep="")) #} }