insertDateIntoOutputFilename.Rmd

---
title: "R Notebook"
output:
  html_document: default
  html_notebook: default
knit: (function(inputFile, encoding) { rmarkdown::render(inputFile, encoding = encoding, output_file = paste0(substr(inputFile,1,nchar(inputFile)-4),"_",Sys.Date(),'.pdf')) })
---

From: http://stackoverflow.com/questions/32377291/insert-date-in-filename-while-knitting-document-using-rstudio-knit-button

This code (see header above) will insert the current date in to the html output filename. Limited - only works with pdf & changes function of knit button! 

Change the `.pdf` to `.html` if you knit to html.

Better to use:

`rmarkdown::render("test.Rmd",output_file=paste0('test',Sys.Date(),'.html'))`

(or similar) in the console...