How to use

std

method

in

org.apache.hadoop.hbase.client.coprocessor.AsyncAggregationClient

@Test
public void testStd() throws InterruptedException, ExecutionException {
 double avgSq =
   LongStream.range(0, COUNT).map(l -> l * l).reduce((l1, l2) -> l1 + l2).getAsLong()
     / (double) COUNT;
 double avg = (COUNT - 1) / 2.0;
 double std = Math.sqrt(avgSq - avg * avg);
 assertEquals(std, AsyncAggregationClient
   .std(TABLE, new LongColumnInterpreter(), new Scan().addColumn(CF, CQ)).get().doubleValue(),
  DELTA);
}

@Test
public void testStd() throws InterruptedException, ExecutionException {
 double avgSq =
   LongStream.range(0, COUNT).map(l -> l * l).reduce((l1, l2) -> l1 + l2).getAsLong()
     / (double) COUNT;
 double avg = (COUNT - 1) / 2.0;
 double std = Math.sqrt(avgSq - avg * avg);
 assertEquals(std, AsyncAggregationClient
   .std(TABLE, new LongColumnInterpreter(), new Scan().addColumn(CF, CQ)).get().doubleValue(),
  DELTA);
}

@Test
public void testStd() throws InterruptedException, ExecutionException {
 double avgSq =
   LongStream.range(0, COUNT).map(l -> l * l).reduce((l1, l2) -> l1 + l2).getAsLong()
     / (double) COUNT;
 double avg = (COUNT - 1) / 2.0;
 double std = Math.sqrt(avgSq - avg * avg);
 assertEquals(std, AsyncAggregationClient
   .std(TABLE, new LongColumnInterpreter(), new Scan().addColumn(CF, CQ)).get().doubleValue(),
  DELTA);
}