title: Is there an easy way to standardize every single column in a table without loops (using R)?
body: <p>I need to standardize all except one column in a dataframe, with which I'm using knn. I know that I can do this with loops, but it seems like there might be an easier way, especially since I am working with 200+ columns/factors, which would have to be renamed.</p>
  
  <p>Any suggestions?</p>