# tensorflow::ops::ApplyFtrlV2

`#include <training_ops.h>`

Update '\*var' according to the Ftrl-proximal scheme.

## Summary

grad_with_shrinkage = grad + 2 \* l2_shrinkage \* var accum_new = accum + grad_with_shrinkage \* grad_with_shrinkage linear += grad_with_shrinkage + (accum_new\^(-lr_power) - accum\^(-lr_power)) / lr \* var quadratic = 1.0 / (accum_new\^(lr_power) \* lr) + 2 \* l2 var = (sign(linear) \* l1 - linear) / quadratic if \|linear\| \> l1 else 0.0 accum = accum_new

Arguments:

- scope: A [Scope](https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/scope#classtensorflow_1_1_scope) object
- var: Should be from a Variable().
- accum: Should be from a Variable().
- linear: Should be from a Variable().
- grad: The gradient.
- lr: Scaling factor. Must be a scalar.
- l1: L1 regulariation. Must be a scalar.
- l2: L2 shrinkage regulariation. Must be a scalar.
- lr_power: Scaling factor. Must be a scalar.

<br />

Optional attributes (see `https://www.tensorflow.org/versions/r1.15/api_docs/cc/struct/tensorflow/ops/apply-ftrl-v2/attrs#structtensorflow_1_1ops_1_1_apply_ftrl_v2_1_1_attrs`):

- use_locking: If `True`, updating of the var and accum tensors will be protected by a lock; otherwise the behavior is undefined, but may exhibit less contention.

<br />

Returns:

- `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/output#classtensorflow_1_1_output`: Same as "var".

<br />

| ### Constructors and Destructors ||
|---|---|
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/apply-ftrl-v2#classtensorflow_1_1ops_1_1_apply_ftrl_v2_1add964fb0f6de2aa24265dcd061c72151(const ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/scope#classtensorflow_1_1_scope & scope, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input var, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input accum, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input linear, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input grad, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input lr, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input l1, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input l2, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input l2_shrinkage, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input lr_power)` ||
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/apply-ftrl-v2#classtensorflow_1_1ops_1_1_apply_ftrl_v2_1a0b32d8c13b43426f739ff6590cd07303(const ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/scope#classtensorflow_1_1_scope & scope, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input var, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input accum, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input linear, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input grad, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input lr, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input l1, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input l2, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input l2_shrinkage, ::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/input#classtensorflow_1_1_input lr_power, const https://www.tensorflow.org/versions/r1.15/api_docs/cc/struct/tensorflow/ops/apply-ftrl-v2/attrs#structtensorflow_1_1ops_1_1_apply_ftrl_v2_1_1_attrs & attrs)` ||

| ### Public attributes ||
|---|---|
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/apply-ftrl-v2#classtensorflow_1_1ops_1_1_apply_ftrl_v2_1aff11a6d3c5a685a3bce58b6eba270910` | `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/operation#classtensorflow_1_1_operation` |
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/apply-ftrl-v2#classtensorflow_1_1ops_1_1_apply_ftrl_v2_1a37c9c6929132980b64306940e4296ed2` | `::https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/output#classtensorflow_1_1_output` |

| ### Public functions ||
|---|---|
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/apply-ftrl-v2#classtensorflow_1_1ops_1_1_apply_ftrl_v2_1ab2dafdb4818ad20aa0e4eed79cfba879() const ` | `::tensorflow::Node *` |
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/apply-ftrl-v2#classtensorflow_1_1ops_1_1_apply_ftrl_v2_1a1aede95dcc376ee0ac6c62cfe06d7314() const ` | ` `` ` |
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/apply-ftrl-v2#classtensorflow_1_1ops_1_1_apply_ftrl_v2_1a331dd3212dc856b76c62ccc135c74656() const ` | ` `` ` |

| ### Public static functions ||
|---|---|
| `https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/apply-ftrl-v2#classtensorflow_1_1ops_1_1_apply_ftrl_v2_1a5c25a36e1a6eef1e216f631e173e3e42(bool x)` | `https://www.tensorflow.org/versions/r1.15/api_docs/cc/struct/tensorflow/ops/apply-ftrl-v2/attrs#structtensorflow_1_1ops_1_1_apply_ftrl_v2_1_1_attrs` |

| ### Structs ||
|---|---|
| [tensorflow::ops::ApplyFtrlV2::Attrs](https://www.tensorflow.org/versions/r1.15/api_docs/cc/struct/tensorflow/ops/apply-ftrl-v2/attrs) | Optional attribute setters for [ApplyFtrlV2](https://www.tensorflow.org/versions/r1.15/api_docs/cc/class/tensorflow/ops/apply-ftrl-v2#classtensorflow_1_1ops_1_1_apply_ftrl_v2). |

## Public attributes

### operation

```
Operation operation
```

### out

```
::tensorflow::Output out
```

## Public functions

### ApplyFtrlV2

```
 ApplyFtrlV2(
  const ::tensorflow::Scope & scope,
  ::tensorflow::Input var,
  ::tensorflow::Input accum,
  ::tensorflow::Input linear,
  ::tensorflow::Input grad,
  ::tensorflow::Input lr,
  ::tensorflow::Input l1,
  ::tensorflow::Input l2,
  ::tensorflow::Input l2_shrinkage,
  ::tensorflow::Input lr_power
)
```

### ApplyFtrlV2

```
 ApplyFtrlV2(
  const ::tensorflow::Scope & scope,
  ::tensorflow::Input var,
  ::tensorflow::Input accum,
  ::tensorflow::Input linear,
  ::tensorflow::Input grad,
  ::tensorflow::Input lr,
  ::tensorflow::Input l1,
  ::tensorflow::Input l2,
  ::tensorflow::Input l2_shrinkage,
  ::tensorflow::Input lr_power,
  const ApplyFtrlV2::Attrs & attrs
)
```

### node

```
::tensorflow::Node * node() const 
```

### operator::tensorflow::Input

```
 operator::tensorflow::Input() const 
```

### operator::tensorflow::Output

```
 operator::tensorflow::Output() const 
```

## Public static functions

### UseLocking

```
Attrs UseLocking(
  bool x
)
```