Tony questions

• Selecting the first nth rows by group with number of rows varied
• How to combine a list of unequal lm object length into a data frame?
• How to modify and save Rprofile.site under Windows?
• Summary statistics using ddply
• Interface between Octave and R
• How to generate the following sequence without resorting to a loop?
• How to output a message in snowfall?
• How to insert a comma between each element in paste command in R?
• Random numbers generation with awk in BASH shell
• How is 95% CI calculated using confint in R?

Tony answers