| weight {sjstats} | R Documentation |
These functions weight the variable x by
a specific vector of weights.
weight(x, weights, digits = 0) weight2(x, weights)
x |
(Unweighted) variable |
weights |
Vector with same length as |
digits |
Numeric value indicating the number of decimal places to be
used for rounding the weighted values. By default, this value is
|
weight2() sums up all weights values of the associated
categories of x, whereas weight() uses a
xtabs formula to weight cases. Thus, weight()
may return a vector of different length than x.
The weighted x.
The values of the returned vector are in sorted order, whereas the values'
order of the original x may be spread randomly. Hence, x can't be
used, for instance, for further cross tabulation. In case you want to have
weighted contingency tables or (grouped) box plots etc., use the weightBy
argument of most functions.
v <- sample(1:4, 20, TRUE) table(v) w <- abs(rnorm(20)) table(weight(v, w)) table(weight2(v, w)) set.seed(1) x <- sample(letters[1:5], size = 20, replace = TRUE) w <- runif(n = 20) table(x) table(weight(x, w))