topBottomN function will will grab the top N percent or botom N percent of values of a column and return it in a H2OFrame.
h2o.topBottomN(x, column, nPercent, grabTopN)
| x | an H2OFrame | 
|---|---|
| column | is a column name or column index to grab the top N percent value from | 
| nPercent | a top percentage values to grab | 
| grabTopN | if -1 grab bottom percentage, 1 grab top percentage | 
An H2OFrame with 2 columns: first column is the original row indices, second column contains the values