Hi!
It used to work out of the box within RStudio, but now the images are not embedded anymore in the output. I tried to fix it from within R:
knit2html("average.Rmd", options=c("use_xhtml","smartypants","mathjax","highlight_code", "base64_images"))
(this is inspired from
http://stackoverflow.com/questions/14870589/knitr-r-how-not-to-embed-images-in-the-html-file)
but the "base64_images" option doesn't fix the problem. the md files shows, for example:

which is translated to
<p><img src="figure/boxplots%20all1.png" alt="plot of chunk boxplots all"/> </p>
What puzzles me the most is that in some report, some of the images are embedded and others are not.
Any idea?
Thanks for your help.
ge