cmd + shift + enter ⌘ + ⇧ + ⏎
https://marketplace.visualstudio.com/items?itemName=Mikhail-Arkhipov.r
https://stackoverflow.com/questions/4369400/plot-the-shaded-region-under-y-sinx-in-r
https://stackoverflow.com/questions/40531262/plot-sine-curve-in-r