Have a look at http://adv-r.had.co.nz/Subsetting.html#subsetting-operators http://adv-r.had.co.nz/Subsetting.html#subsetting-operators. There was just too much

Have a look at http://adv-r.had.co.nz/Subsetting.html#subsetting-operators http://adv-r.had.co.nz/Subsetting.html#subsetting-operators. There was just too much material to fit in one chapter.