Re: [R] Checking for normality and homogeneity of variance

2010-01-05 Thread Alain Zuur
Haiyang AI wrote: Dear all, I'm a beginner of R and I need to carry out some three-way mixed ANOVAs. Following examples at http://personality-project.org/r/r.anova.html, I managed to get the ANOVA part, but I don't know how can I check data normality and homogeneity of variance in R

[R] Checking for normality and homogeneity of variance

2010-01-04 Thread Haiyang AI
Dear all, I'm a beginner of R and I need to carry out some three-way mixed ANOVAs. Following examples at http://personality-project.org/r/r.anova.html, I managed to get the ANOVA part, but I don't know how can I check data normality and homogeneity of variance in R (since they're the required

Re: [R] Checking for normality and homogeneity of variance

2010-01-04 Thread Schalk Heunis
For normality check out: ?shapiro.test HTH! Schalk On Tue, Jan 5, 2010 at 5:32 AM, Haiyang AI aihaiy...@gmail.com wrote: Dear all, I'm a beginner of R and I need to carry out some three-way mixed ANOVAs. Following examples at http://personality-project.org/r/r.anova.html, I managed to get