title: knitr HTML output too large
body: <p>I have been using <code>rmarkdown</code>/<code>knitr</code>'s <code>knit to html</code> capability to generate html code for some blogs. I've found it extremely helpful and convenient, but have been running into some problems lately with file size. </p>
  
  <p>When I knit a script that has graphics that use shapefiles or <code>ggmap</code> images, the html file gets too big for the blog host to make sense of it (I've tried with both blogger and wordpress). I believe this has to do with the relatively large data.frames/files that are the shapefiles/<code>ggmap</code> being put into html form. Is there anything I can do to get a smaller html file that can be parsed by a blog host? </p>
  
  <p>For reference, the html output from an rmarkdown script with one graphic using a <code>ggmap</code> layer, a layer of shapefiles and some data is 1.90MB, which is too big for blogger or wordpress to handle in html input. Thanks for any ideas.</p>