title: Ignore all errors occurring when knitting R markdown (Rmd) file?
body: <p>I know how to <a href="https://stackoverflow.com/questions/34280043/how-to-skip-error-checking-at-rmarkdown-compiling">ignore <em>R</em> errors when knitting</a>, but is it possible to knit the entire markdown doc (or as much of it as possible) whilst ignoring <em>all</em> errors that occur whilst knitting?</p>
  
  <p>For example, if a package was missing, have the doc knit anyway (as best it can). </p>
  
  <p>As an example use case, when you want to quickly knit an Rmd (possible just to quickly check something), but some other issues have occurred that you know don't affect the part you're wishing to look at.</p>