[R] Warning message for TukeyHSD test - error

2014-03-21 Thread Valentina Lauria
Dear R list, I am trying to fit a one way anova with just one factor and 3 levels. One of my levels is significant av2-aov(site~Tryptophan, data=datafit) summary(av2) Df Sum Sq Mean Sq F value Pr(F) Tryptophan 1 155.3 155.32 5.875 0.025 * Residuals 20 528.8 26.44 ---

Re: [R] Warning message for TukeyHSD test - error

2014-03-21 Thread Rmh
you have only 1 df for tryptophan. make it a factor and then all shoukd work. Sent from my iPhone On Mar 21, 2014, at 12:38, Valentina Lauria valentina.lau...@plymouth.ac.uk wrote: Dear R list, I am trying to fit a one way anova with just one factor and 3 levels. One of my levels is