title: How to open up a matrix that's running into an error
body: <p>I am running into an error on a big job in R. I running it as an R script. I keep getting the error that <code>Error in chol.default(F.mat) :
    the leading minor of order 1 is not positive definite</code>. </p>
  
  <p>I normally run my job in a qsub but that only gives me an error output but I can't poke around. I then tried running my job locally but my 4gb Macbook was completely overwhelmed. </p>
  
  <p>Now I am trying using <code>screen name</code> and running it on a screen with <code>options(error=recover)</code>. Now I am running into the same error as above but I don't know how to access the data frames. I get <code>recover called non-interactively; frames dumped, use debugger() to view</code> but then I get put into my bash line and I don't know how to open up the data frame. </p>
  
  <p>Any ideas?</p>