title: Suppress C warning messages in R
body: <p>I am calling an R function from the R package e1071 which is interfaced with libsvm (a C program). This function is passing C (printf) warning messages to the R console. I know this because the warning messages are of the form (warning:...) whereas R warning messages are capitalized (i.e. Warning:...). </p>
  
  <p>I've tried everything to get rid of these messages in R (sink, suppressWarnings, invisible) but nothing seems to work. </p>
  
  <p>Any ideas?</p>
  
  <p>Thanks!</p>