get rid of quartz() and windows(), but this is the best option for identity() function, because after enlarging small GUI window, identify function has problems, hard to hit the points, same problem when using dev.new(), because only new window is created when graph was produced before
get rid of quartz() and windows(), but this is the best option for identity() function, because after enlarging small GUI window, identify function has problems, hard to hit the points, same problem when using dev.new(), because only new window is created when graph was produced before