There are many functions in R that can provide descriptive statistics. A few of the more common options are shown below.
The summary function provides the Min, 1stQuar, Median, Mean, 3rdQuar, and Max values.
The describe function provides the total n, number of missing values, number of unique values, mean, 5th, 10th, 25th, 50th, 75th, 90th, and 95th percentiles, and the frequency of each value.
> install.packages ("Hmisc")
> library (Hmisc)
> describe (pressure)
The stat.desc function provides the total n, number of null values, number of na values, min, max, range, sum, median, mean, SE of the mean, 95% CI of the mean, var, standard deviation, and coeff of var.
> install.packages ("pastecs")
> library (pastecs)
> stat.desc (pressure)