Options are separated using ";" and need to be valid Julia expressions. Example: markdown code chunk that saves and displays a 12 cm wide image and hides the source code:
-`echo = true`: Echo the code in the output document. If `false` the source code will be hidden.
-`results = "markup"`: The output format of the printed results. `"markup"` for literal block, `"hidden"` for hidden results, or anything else for raw output (I tend to use `"tex"` for Latex and `"rst"` for rest). Raw output is useful if you want to e.g. create tables from code chunks.
-`eval = true`: Evaluate the code chunk. If `false` the chunk won’t be executed.
-`term = false`: If `true` the output emulates a REPL session. Otherwise only stdout and figures will be included in output.
-`label = nothing`: Chunk label, will be used for figure labels in Latex as `fig:label`.
-`wrap = true`: Wrap long lines from output.
-`line_width = 75`: Line width for wrapped lines.
-`cache = false`: Cache results, depending on `cache` parameter on `weave` function.
-`hold = false`: Hold all results until the end of the chunk.
-`tangle = true`: Set tangle to `false` to exclude chunk from tangled code.