(.)(.) Variance Gamma process histograms for survey stats and fats Example: From 'The R Book' 2nd ed. ~ 2.3.2 Generating Factor Levels... Área sob curvas de funções: Integração numérica utilizando a regra do trapézio. Example for barplot cool ggplot Which one is which ! Grafico Are the items of a vector in a given data frame? (Filtering basics)