summ {rchemo}

Description of the quantitative variables of a data set

Description

Displays summary statistics for each quantitative column of the data set.

Usage

summ(X, nam = NULL, digits = 3)

Arguments

X

A matrix or data frame containing the variables to summarize.

nam

Names of the variables to summarize (vector of character strings). Default to NULL (all the columns are considered).

digits

Number of digits for the numerical outputs.

Value

tab

A dataframe of summary statistics : NbVal, Mean, Min., Max., Stdev, Median, X1st.Qu., X3rd.Qu., NbNA

ntot

number of observations

Examples

dat <- data.frame(
  v1 = rnorm(10),
  v2 = c(NA, rnorm(8), NA),
  v3 = c(NA, NA, NA, rnorm(7))
  )
dat

summ(dat)
summ(dat, nam = c("v1", "v3"))