'Why don't R Notebooks save/embed outputs in the file or R Project?

When I send or receive an R notebook, or even an R Project (from RStudio), the R notebook doesn't maintain any of the outputs; neither printed text or graphics show up, and the whole notebook has to be re-run to show the outputs. Is there some kind of setting I can turn on to make sure the outputs are embedded in the R Notebook so that I can send the notebook to someone else, like with Jupyter notebooks?



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