Alexindata - 4 months ago 41
Markdown Question

# What does $$do in Rstudio markdown document? I accidentally typed $$
somewhere in the markdown portion of my Rstudio markdown document and found that all downstream markdown coding had been turned off. It took me a while to trace the problem to the
$$ , which appeared in dark-red color. My question is what does $$
do? I have looked in markdown documentations and have not found any references to
$$ . Answer $$ is a markup for math. See the relevant section in the pandoc manual. Everything written between two $$ markup will be interpreted as tex math (here is some documentation). Note that you can also use a single  sign. $$ will produce a block element (a paragraph) while $ will produce an inline element. Thus, $$ is often used for equations. Try for instance: Here is an inline formula: \frac{\alpha}{n} that shows... Here is a standalone equation:$$x \approx \frac{\alpha}{n}$\$