Top "Anova" questions

Repeated-measures / within-subjects ANOVA in R

I'm attempting to run a repeated-meaures ANOVA using R. I've gone through various examples on various websites, but they never …

r anova

Homoscedascity test for Two-Way ANOVA

I've been using var.test and bartlett.test to check basic ANOVA assumptions, among others, homoscedascity (homogeniety, equality of variances). …

r testing variance anova

How to perform single factor ANOVA in R with samples organized by column?

I have a data set where the samples are grouped by column. The following sample dataset is similar to my …

r anova

How to extract a p-value when performing anova() between two glm models in R

So, I'm trying to compare two models, fit1 and fit2. Initially, I was just doing anova(fit1,fit2), and this …

r model regression glm anova

Error in TukeyHSD in R

I'm working on mixed design ANOVA and would like to run TukeyHSD for its post-Hoc test. I keep getting error, "…

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Tukey HSD for mixed continuous and categorical variables, error: "no factors"

I'm trying to run a Tukey test on mortality data, where I want to test whether mortality is influenced by …

r anova categorical-data continuous

Posthoc labels on anova boxplot in R

If I have some data and do an ANOVA and post-hoc tests, how do I make a boxplot that adds …

r boxplot anova posthoc

ANOVA error on R

I get this error when I run an ANOVA on R: Warning messages: 1: In model.response(mf, "numeric") : using type = "…

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manova in R error message: length of 'dimnames' [1] not equal to array extent

Trying to run manova on this data: Create a data.frame: acc <- data.frame(Degrees = c("5","8","10"), MPH10=c(0.35, 0.37, 0.32), …

arrays r anova two-way

How do I get R to spit out the critical value for F-statistic based on ANOVA?

The one thing missing from an ANOVA analysis in R is that it doesn't automatically display the critical value. Everything …

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