questionr (version 0.7.5)

wtd.mean: Weighted mean and variance of a vector

Description

Compute the weighted mean or weighted variance of a vector. Exact copies of Hmisc functions.

Usage

wtd.mean(x, weights = NULL, na.rm = TRUE)

Arguments

x

Numeric data vector

weights

Numeric weights vector. Must be the same length as x

na.rm

if TRUE, delete NA values.

Details

If weights is NULL, then an uniform weighting is applied.

See Also

mean,var, wtd.table and the survey package.

Examples

# NOT RUN {
data(hdv2003)
mean(hdv2003$age)
wtd.mean(hdv2003$age, weights=hdv2003$poids)
# }