# Creating and accessing data frames

# Create two vectors of different types

kids<-c("Jack", "Jill")
ages<-c(12,10)

# Build a dataframe from the vectors

d<-data.frame(kids, ages, stringsAsFactors = FALSE)

# Display the data frame

d

# Access the data frame

# Using tags

d$kids
d$ages

# Using list indices

d[[1]]
d[[2]]

# Using matrix indices

d[1,]
d[2,]
d[,1]
d[,2]