View source: R/check_homogeneity.R

check_homogeneity | R Documentation |

Check model for homogeneity of variances between groups described by independent variables in a model.

check_homogeneity(x, method = c("bartlett", "fligner", "levene", "auto"), ...) ## S3 method for class 'afex_aov' check_homogeneity(x, method = "levene", ...)

`x` |
A linear model or an ANOVA object. |

`method` |
Name of the method (underlying test) that should be performed
to check the homogeneity of variances. May either be |

`...` |
Arguments passed down to |

Invisibly returns the p-value of the test statistics. A p-value < 0.05 indicates a significant difference in the variance between the groups.

There is also a `plot()`

-method implemented in the see-package.

model <<- lm(len ~ supp + dose, data = ToothGrowth) check_homogeneity(model) # plot results if (require("see")) { result <- check_homogeneity(model) plot(result) }

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