title: means and SD for columns in a dataframe with NA values
body: <p>I'm trying to calculate the mean and standard deviation of several columns (except the first column) in a data.frame with <code>NA</code> values. </p>
  
  <p>I've tried <code>colMeans</code>, <code>sapply</code>, etc., to create a loop that runs through the data.frame and then stores means and standard deviations in a separate table but keep getting a "FUN" error. any help would be great. Thanks</p>
  
  <p>a</p>