knitr button in rstudio

Question

I'm a beginner to R and Rstudio. One of my first problems is that I do not have the knitr option in rstudio, despite having installed the knitr package. I have checked and I do have the last version of Rstudio. I am aware of how dumb this question is, but I can't but ask it after I tried everything. Shockingly, I have the knitr option/button at work, where Rstudio was installed in the same fashion (apparently). I'm attaching a screenshot of my rstudio. Any ideas?

Answer 1

You apparently don't have your file saved with a standard extension where it will auto-detect the file type from. You can save with .Rmd or whatever is appropriate. Alternatively in the bottom right of your source pane you should see "Text File" -> Go ahead and click and change that to R Markdown or R presentation or whatever is appropriate for your particular file.