Draw a random sample from a chi square distribution

Usage

# S3 method for class 'ChiSquare'
random(x, n = 1L, drop = TRUE, ...)

Arguments

x: A ChiSquare object created by a call to ChiSquare().
n: The number of samples to draw. Defaults to 1L.
drop: logical. Should the result be simplified to a vector if possible?
...: Unused. Unevaluated arguments will generate a warning to catch mispellings or other possible errors.

Value

In case of a single distribution object or n = 1, either a numeric vector of length n (if drop = TRUE, default) or a matrix with n columns (if drop = FALSE).

Examples


set.seed(27)

X <- ChiSquare(5)
X
#> [1] "ChiSquare(df = 5)"

mean(X)
#> [1] 5
variance(X)
#> [1] 10
skewness(X)
#> [1] 1.264911
kurtosis(X)
#> [1] 2.4

random(X, 10)
#>  [1] 11.2129049  7.8935724  2.1298341  5.2084236  5.4563211  3.6636712
#>  [7] 10.9823299  0.7858347  4.8748588  1.7938110

pdf(X, 2)
#> [1] 0.1383692
log_pdf(X, 2)
#> [1] -1.97783

cdf(X, 4)
#> [1] 0.450584
quantile(X, 0.7)
#> [1] 6.06443

cdf(X, quantile(X, 0.7))
#> [1] 0.7
quantile(X, cdf(X, 7))
#> [1] 7