> This is why in R some use periods for separators (ice.cream) rather than underscores (ice_cream) ... and since the dot is legal in identifiers, they use $ as

> This is why in R some use periods for separators (ice.cream) rather than underscores (ice_cream) ... and since the dot is legal in identifiers, they use $ as lookup operator. > ice.cream$flavor [1] "chocolate" "vanilla" "butterscotch advocado surprise"