descr {eatTools} | R Documentation |
Descriptive statistics for one or several variables
Description
Function computes descriptive statistics for one variable or several variables within a data frame.
Usage
descr (variable, na = NA, p.weights = NULL, na.rm = FALSE, verbose=TRUE)
Arguments
variable |
one variable or a data.frame with several variables |
na |
optional values with should be considered a missing values |
p.weights |
optional: vector with individual weights if weighted statistics should be computed |
na.rm |
logical: should missings be removed prior to estimation? |
verbose |
logical: Print messages to console? |
Value
a data frame with the following columns
N |
number of observations |
N.valid |
number of non-missing observations |
Missing |
number of missings |
Minimum |
minimum of numeric variables |
Maximum |
maximum of numeric variables |
Sum |
sum of numeric variables |
Mean |
arithmetic mean of numeric variables |
std.err |
standard error of the arithmetic mean. Note: for weighted means, standard error
is estimated according to Cochran (1977): |
sig |
p value |
Median |
median of numeric variables |
SD |
standard deviation of numeric variables |
Var |
variance of numeric variables |
Author(s)
Sebastian Weirich
References
Cochran W. G. (1977). Sampling Techniques (3rd Edn). Wiley, New York
Examples
data(mtcars)
descr(mtcars)