OneHot

public final class OneHot

Returns a one-hot tensor.

The locations represented by indices in `indices` take value `on_value`, while all other locations take value `off_value`.

If the input `indices` is rank `N`, the output will have rank `N+1`, The new axis is created at dimension `axis` (default: the new axis is appended at the end).

If `indices` is a scalar the output shape will be a vector of length `depth`.

If `indices` is a vector of length `features`, the output shape will be: 

features x depth if axis == -1
   depth x features if axis == 0
If `indices` is a matrix (batch) with shape `[batch, features]`, the output shape will be: 
batch x features x depth if axis == -1
   batch x depth x features if axis == 1
   depth x batch x features if axis == 0
Examples =========

Suppose that 

indices = [0, 2, -1, 1]
   depth = 3
   on_value = 5.0
   off_value = 0.0
   axis = -1
Then output is `[4 x 3]`: 
output =
   [5.0 0.0 0.0]  // one_hot(0)
   [0.0 0.0 5.0]  // one_hot(2)
   [0.0 0.0 0.0]  // one_hot(-1)
   [0.0 5.0 0.0]  // one_hot(1)
Suppose that 
indices = [0, 2, -1, 1]
   depth = 3
   on_value = 0.0
   off_value = 3.0
   axis = 0
Then output is `[3 x 4]`: 
output =
   [0.0 3.0 3.0 3.0]
   [3.0 3.0 3.0 0.0]
   [3.0 3.0 3.0 3.0]
   [3.0 0.0 3.0 3.0]
 //  ^                one_hot(0)
 //      ^            one_hot(2)
 //          ^        one_hot(-1)
 //              ^    one_hot(1)
Suppose that 
indices = [[0, 2], [1, -1]]
   depth = 3
   on_value = 1.0
   off_value = 0.0
   axis = -1
Then output is `[2 x 2 x 3]`: 
output =
   [
     [1.0, 0.0, 0.0]  // one_hot(0)
     [0.0, 0.0, 1.0]  // one_hot(2)
   ][
     [0.0, 1.0, 0.0]  // one_hot(1)
     [0.0, 0.0, 0.0]  // one_hot(-1)
   ]

Nested Classes

class OneHot.Options Optional attributes for OneHot  

Public Methods

Output<U>
asOutput()
Returns the symbolic handle of a tensor.
static OneHot.Options
axis(Long axis)
static <U, T extends Number> OneHot<U>
create(Scope scope, Operand<T> indices, Operand<Integer> depth, Operand<U> onValue, Operand<U> offValue, Options... options)
Factory method to create a class wrapping a new OneHot operation.
Output<U>
output()
The one-hot tensor.

Inherited Methods

Public Methods

public Output<U> asOutput ()

Returns the symbolic handle of a tensor.

Inputs to TensorFlow operations are outputs of another TensorFlow operation. This method is used to obtain a symbolic handle that represents the computation of the input.

public static OneHot.Options axis (Long axis)

Parameters
axis The axis to fill (default: -1, a new inner-most axis).

public static OneHot<U> create (Scope scope, Operand<T> indices, Operand<Integer> depth, Operand<U> onValue, Operand<U> offValue, Options... options)

Factory method to create a class wrapping a new OneHot operation.

Parameters
scope current scope
indices A tensor of indices.
depth A scalar defining the depth of the one hot dimension.
onValue A scalar defining the value to fill in output when `indices[j] = i`.
offValue A scalar defining the value to fill in output when `indices[j] != i`.
options carries optional attributes values
Returns
  • a new instance of OneHot

public Output<U> output ()

The one-hot tensor.