# Uso il dataset di esempio
data("ChickWeight")

# Struttura del dataset
str(ChickWeight)

# Elenco delle variabili
colnames(ChickWeight)

# Richiamare le variabili
ChickWeight[1]
ChickWeight[,1]
ChickWeight$weight 
ChickWeight[[1]]
ChickWeight$weight 
ChickWeight[[1]]
ChickWeight[["weight"]]
Chickweight[,"weight"]

# Elenco dei casi
rownames(ChickWeight)

# Richiamare i casi
ChickWeight[1,]
ChickWeight["1",]

# Richiamare i valori
ChickWeight[310,"Diet"]
ChickWeight$Diet[ChickWeight$Diet==3]

# attach: recupero veloce
attach(ChickWeight)
weight
detach(ChickWeight)