org.datavec.api.transform

Enum ReduceOp

java.lang.Object

java.lang.Enum<ReduceOp>

org.datavec.api.transform.ReduceOp

All Implemented Interfaces:

java.io.Serializable, java.lang.Comparable<ReduceOp>

public enum ReduceOp
extends java.lang.Enum<ReduceOp>

ReduceOp defines the type of column reductions that can be used when reducing a set of values to a single value.
Min: take the minimum value
Max: take the maximum value
Range: output the value max-min
Sum: Reduce by summing all values
Mean: Reduce by taking the arithmetic mean of the values
Stdev: Reduce by calculating the sample standard deviation
Count: Reduce by doing a simple count
CountUnique: Reduce by counting the number of unique values
TakeFirst: Take the first possible value in the list
TakeLast: Take the last possible value in the list
Note: For custom reduction operations with Reducer , use the ColumnReduction functionality.

Enum Constant Summary

Enum Constants

Enum Constant and Description
Count
CountUnique
Max
Mean
Min
Prod
Range
Stdev
Sum
TakeFirst
TakeLast

Method Summary

Modifier and Type	Method and Description
static ReduceOp	valueOf(java.lang.String name) Returns the enum constant of this type with the specified name.
static ReduceOp[]	values() Returns an array containing the constants of this enum type, in the order they are declared.

Methods inherited from class java.lang.Enum

clone, compareTo, equals, finalize, getDeclaringClass, hashCode, name, ordinal, toString, valueOf

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Enum Constant Detail

Prod

public static final ReduceOp Prod

Min

public static final ReduceOp Min

Max

public static final ReduceOp Max

Range

public static final ReduceOp Range

Sum

public static final ReduceOp Sum

Mean

public static final ReduceOp Mean

Stdev

public static final ReduceOp Stdev

Count

public static final ReduceOp Count

CountUnique

public static final ReduceOp CountUnique

TakeFirst

public static final ReduceOp TakeFirst

TakeLast

public static final ReduceOp TakeLast

Method Detail

values

public static ReduceOp[] values()

Returns an array containing the constants of this enum type, in the order they are declared. This method may be used to iterate over the constants as follows:

for (ReduceOp c : ReduceOp.values())
    System.out.println(c);

Returns:

an array containing the constants of this enum type, in the order they are declared

valueOf

public static ReduceOp valueOf(java.lang.String name)

Returns the enum constant of this type with the specified name. The string must match exactly an identifier used to declare an enum constant in this type. (Extraneous whitespace characters are not permitted.)

Parameters:

name - the name of the enum constant to be returned.

Returns:

the enum constant with the specified name

Throws:

java.lang.IllegalArgumentException - if this enum type has no constant with the specified name

java.lang.NullPointerException - if the argument is null