[R] Tools for professional R developers

Hi everyone, I was wondering what tools professional R users use so I went and posted this question on stack overflow. I appreciate if you would please answer this question too (either here or on stackoverflow) Here is the link to the question http://stackoverflow.com/questions/6796490/tools-fo

[R] Calculating the mean of values in tables using formulae

I know commands like xtabs and table allow a user to do cross-tabulation For example the following command generates a pivot table that shows the number of cars that have the same number of gears and cylinders. >xtabs(~cyl+gear,data =mtcars)    gear cyl  3 4 5   4 1 8 2   6 2 4 1   812 0 2 > We

[R] What are the good tools for professional R developers?

I am trying to make this transition from a casual R programmer to a professional programmer (trying to make money with R) What tools should a professional R developer have? what are the good utilities that can help R developers to code and debug more efficiently? what type of tools are missing?

[R] Converting an ftable (contingency table) to a dataframe in R

I am generating an ftable (by running ftable on the results of a xtabs command) and I am getting the following.                                                                    Var1  Var2 date                 group                                                2007-01-01          q1