Choosing between qplot() and ggplot() in ggplot2 [closed]

Answer 1

• qplot is the simplest choice if you are dealing with input vectors
• ggplot requires a data.frame as input data structure.

When you want to produce a histogram, qplot needs only the vector of occurrences

#rnorm 
x <- rnorm(10)

#ggplot2 package: qplot
qplot(x, geom="histogram")

#ggplot2: using straight ggplot (requires conversion to data.frame)
ggplot(data.frame(x), aes(x)) + geom_histogram()