Hmmm, I'm not sure there is an Excel style graph wizard, although there's this package which is close https://www.r-statistics.com/2016/11/ggedit-interactive-ggpl...

For PML() kinds of functions, I often just google something like "Excel PML() function in R" and something usually turns up: - https://cran.r-project.org/web/packages/optiRum/optiRum.pdf - https://gist.github.com/econ-r/dcd503815bbb271484ff

Another good tactic is to follow some of the R quants on twitter. A really popular package for this is http://www.quantmod.com/