descr {eatTools} | R Documentation |
Function computes descriptive statistics for one variable or several variables within a data frame.
descr (variable, na = NA, p.weights = NULL, na.rm = FALSE, verbose=TRUE)
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? |
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): sigma_x^2=n/((n-1)*w_s^2)*Sigma(w_i^2*(x_i-x)). |
sig |
p value |
Median |
median of numeric variables |
SD |
standard deviation of numeric variables |
Var |
variance of numeric variables |
Sebastian Weirich
Cochran W. G. (1977). Sampling Techniques (3rd Edn). Wiley, New York
data(mtcars) descr(mtcars)