# HZ.test: Henze-Zirkler test for Multivariate Normality In mvnTest: Goodness of Fit Tests for Multivariate Normality

## Description

This function implements the Henze-Zirkler test for assessing multivariate normality.

## Usage

 `1` ```HZ.test(data, qqplot = FALSE) ```

## Arguments

 `data` A numeric matrix or data frame `qqplot` if `TRUE` creates a chi-square Q-Q plot

## Details

Calculates the value of the Henze-Zirkler test and the approximate p-value.

## Value

 `HZ` the value of the test statistic `p.value` the p-value of the test `data.name` a character string giving the name of the data

## Note

The printing method and plotting are in part adapted from R package `MVN` (Korkmaz, S. et al., 2015, version 4.0).

## Author(s)

Rashid Makarov, Vassilly Voinov, Natalya Pya

## References

Henze, N. and Zirkler, B. (1990). A class of invariant consistent tests for multivariate normality. Communications in Statistics-Theory and Methods, 19, 3595-3617

`S2.test`, `DH.test`, `AD.test`, `CM.test`, `R.test`
 ``` 1 2 3 4 5 6 7 8 9 10 11 12 13``` ```## generating n bivariate normal random variables... dat <- rmvnorm(n=200,mean=rep(0,2),sigma=matrix(c(4,2,2,4),2,2)) res <- HZ.test(dat) res ## generating n bivariate t distributed with 10df random variables... dat <- rmvt(n=200,sigma=matrix(c(4,2,2,4),2,2)*.8,df=10,delta=rep(0,2)) res1 <- HZ.test(dat) res1 data(iris) setosa = iris[1:50, 1:4] # Iris data only for setosa res2 <- HZ.test(setosa, qqplot = TRUE) res2 ```