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2011 Apr 21
1
Accounting for overdispersion in a mixed-effect model with a proportion response variable and categorical explanatory variables.
Dear R-help-list,
I have a problem in which the explanatory variables are categorical,
the response variable is a proportion, and experiment contains
technical replicates (pseudoreplicates) as well as biological
replicated. I am new to both generalized linear models and mixed-
effects models and would greatly appreciate the advice of experienced
analysts in this matter.
I analyzed the
2008 Jan 26
3
Comparison of aggregate in R and group by in mysql
Hi, netters,
First of all, thanks a lot for all the prompt replies to my earlier question about "merging" data frames in R.
Actually that's an equivalence to the "join" clause in mysql.
Now I have another question. Suppose I have a data frame X with lots of columns/variables:
Name, Age,Group, Type, Salary.
I wanna do a subtotal of salaries:
aggregate(X$Salary,