Execute a graphic function on a plot
do.first allows the user to execute one or more commands before displaying values on a plot.
do.first is an argument in some plotrix functions that allows the user to do things like add a background color or a grid to the plot before displaying the other plot elements.
The value of do.first should be a character string that can be parsed to one or more valid R commands. Remember to enclose the string in quotes, separate commands with semicolons and escape quotes within the string with backslashes if necessary.
Please choose more modern alternatives, such as Google Chrome or Mozilla Firefox.