You can find some format with two column layout like pinp
that modifies the already existing PNAS model in rticles
. In the latter, there are several model and maybe other are two columns. They are based on LaTeX to produce pdf output - you could use them directly and customise, or look at the code and see how it is done. There is some Latex
that can help also.
If what you want is close to dashboard with text and graph and you want html output, you should look at flexdashboard
that offers a layout feature that you can use to achieve two column layout.
For html_document output, you may also use css layout to customise your output the way you want.