Alex Holcombe questions

• Why does this create an "NAs introduced by coercion" warning
• Implement ROT-13 in R
• Is there any way to set the line end style or the line join style in ggplot?
• How does one move the tick labels closer to the axis?
• warnings() does not work within a function? How can one work around this?
• Converting R formula format to mathematical equation
• How to use string variables to create variables list for ddply?
• How can I collapse a dataframe by some variables, taking mean across others
• Is it possible to jitter two ggplot geoms in the same way?
• Changing ylim (axis limits) drops data falling outside range. How can this be prevented?

Alex Holcombe answers