[R-sig-eco] deviance as a goodness of fit in GLM

2014-07-21 Thread Samantha PameLa
Good day everybody, I'm a marine biologist student, working on my bachelor thesis and I'm stucked with a statistical doubt in the process, I hope someone here could help me. My thesis aims to understand which biological and environmental factors influences the male aggressive rate of male

Re: [R-sig-eco] deviance as a goodness of fit in GLM

2014-07-21 Thread Pedro Pequeno
Hi Samantha, R2 is not a good measure for directly comparing alternative models because, among other things, it is also affected by the number of predictors in the model. Rather, you could use a measure such as the Akaike Information Criterion (AIC), which has been specifically designed for such

[R-sig-eco] Color Analysis R

2014-07-21 Thread Luis Fernando GarcĂ­a
Hello! I would like to know if any of you knows how to make a statistical color comparison of some images using R. I am very interested about learning how to do this using R and also further analysis. If any f you has a sample text or a sample exercise I would really appreciate it. All the