[R] Looking for knitr example for beginner (NO RStudio)

[C W]

Hi everyone,

I am using package knitr, FIRST TIME.  I don't have access to RStudio.

Read through Yihui's page, didn't find it helpful.  Stuck on terms
Rnw, GFM (GitHub Flavored Markdown).  Never used Sweave, so the
reference is not helping.

Is there a simple step-by-step example WITHOUT RStudio?

My question:
What is the procedure?  The documentation explains the functions, but
does not say how to operate between R and LaTex.

Mike