Copyright | (c) 2013-2021 Brendan Hay |
---|---|
License | Mozilla Public License, v. 2.0. |
Maintainer | Brendan Hay <brendan.g.hay+amazonka@gmail.com> |
Stability | auto-generated |
Portability | non-portable (GHC extensions) |
Safe Haskell | None |
Creates an Amazon Forecast predictor.
In the request, provide a dataset group and either specify an algorithm or let Amazon Forecast choose an algorithm for you using AutoML. If you specify an algorithm, you also can override algorithm-specific hyperparameters.
Amazon Forecast uses the algorithm to train a predictor using the latest version of the datasets in the specified dataset group. You can then generate a forecast using the CreateForecast operation.
To see the evaluation metrics, use the GetAccuracyMetrics operation.
You can specify a featurization configuration to fill and aggregate the
data fields in the TARGET_TIME_SERIES
dataset to improve model
training. For more information, see FeaturizationConfig.
For RELATED_TIME_SERIES datasets, CreatePredictor
verifies that the
DataFrequency
specified when the dataset was created matches the
ForecastFrequency
. TARGET_TIME_SERIES datasets don't have this
restriction. Amazon Forecast also verifies the delimiter and timestamp
format. For more information, see howitworks-datasets-groups.
By default, predictors are trained and evaluated at the 0.1 (P10), 0.5
(P50), and 0.9 (P90) quantiles. You can choose custom forecast types to
train and evaluate your predictor by setting the ForecastTypes
.
AutoML
If you want Amazon Forecast to evaluate each algorithm and choose the
one that minimizes the objective function
, set PerformAutoML
to
true
. The objective function
is defined as the mean of the weighted
losses over the forecast types. By default, these are the p10, p50, and
p90 quantile losses. For more information, see EvaluationResult.
When AutoML is enabled, the following properties are disallowed:
AlgorithmArn
HPOConfig
PerformHPO
TrainingParameters
To get a list of all of your predictors, use the ListPredictors operation.
Before you can use the predictor to create a forecast, the Status
of
the predictor must be ACTIVE
, signifying that training has completed.
To get the status, use the DescribePredictor operation.
Synopsis
- data CreatePredictor = CreatePredictor' {
- performAutoML :: Maybe Bool
- trainingParameters :: Maybe (HashMap Text Text)
- algorithmArn :: Maybe Text
- hPOConfig :: Maybe HyperParameterTuningJobConfig
- optimizationMetric :: Maybe OptimizationMetric
- autoMLOverrideStrategy :: Maybe AutoMLOverrideStrategy
- evaluationParameters :: Maybe EvaluationParameters
- encryptionConfig :: Maybe EncryptionConfig
- forecastTypes :: Maybe (NonEmpty Text)
- performHPO :: Maybe Bool
- tags :: Maybe [Tag]
- predictorName :: Text
- forecastHorizon :: Int
- inputDataConfig :: InputDataConfig
- featurizationConfig :: FeaturizationConfig
- newCreatePredictor :: Text -> Int -> InputDataConfig -> FeaturizationConfig -> CreatePredictor
- createPredictor_performAutoML :: Lens' CreatePredictor (Maybe Bool)
- createPredictor_trainingParameters :: Lens' CreatePredictor (Maybe (HashMap Text Text))
- createPredictor_algorithmArn :: Lens' CreatePredictor (Maybe Text)
- createPredictor_hPOConfig :: Lens' CreatePredictor (Maybe HyperParameterTuningJobConfig)
- createPredictor_optimizationMetric :: Lens' CreatePredictor (Maybe OptimizationMetric)
- createPredictor_autoMLOverrideStrategy :: Lens' CreatePredictor (Maybe AutoMLOverrideStrategy)
- createPredictor_evaluationParameters :: Lens' CreatePredictor (Maybe EvaluationParameters)
- createPredictor_encryptionConfig :: Lens' CreatePredictor (Maybe EncryptionConfig)
- createPredictor_forecastTypes :: Lens' CreatePredictor (Maybe (NonEmpty Text))
- createPredictor_performHPO :: Lens' CreatePredictor (Maybe Bool)
- createPredictor_tags :: Lens' CreatePredictor (Maybe [Tag])
- createPredictor_predictorName :: Lens' CreatePredictor Text
- createPredictor_forecastHorizon :: Lens' CreatePredictor Int
- createPredictor_inputDataConfig :: Lens' CreatePredictor InputDataConfig
- createPredictor_featurizationConfig :: Lens' CreatePredictor FeaturizationConfig
- data CreatePredictorResponse = CreatePredictorResponse' {
- predictorArn :: Maybe Text
- httpStatus :: Int
- newCreatePredictorResponse :: Int -> CreatePredictorResponse
- createPredictorResponse_predictorArn :: Lens' CreatePredictorResponse (Maybe Text)
- createPredictorResponse_httpStatus :: Lens' CreatePredictorResponse Int
Creating a Request
data CreatePredictor Source #
See: newCreatePredictor
smart constructor.
CreatePredictor' | |
|
Instances
:: Text | |
-> Int | |
-> InputDataConfig | |
-> FeaturizationConfig | |
-> CreatePredictor |
Create a value of CreatePredictor
with all optional fields omitted.
Use generic-lens or optics to modify other optional fields.
The following record fields are available, with the corresponding lenses provided for backwards compatibility:
$sel:performAutoML:CreatePredictor'
, createPredictor_performAutoML
- Whether to perform AutoML. When Amazon Forecast performs AutoML, it
evaluates the algorithms it provides and chooses the best algorithm and
configuration for your training dataset.
The default value is false
. In this case, you are required to specify
an algorithm.
Set PerformAutoML
to true
to have Amazon Forecast perform AutoML.
This is a good option if you aren't sure which algorithm is suitable
for your training data. In this case, PerformHPO
must be false.
$sel:trainingParameters:CreatePredictor'
, createPredictor_trainingParameters
- The hyperparameters to override for model training. The hyperparameters
that you can override are listed in the individual algorithms. For the
list of supported algorithms, see aws-forecast-choosing-recipes.
$sel:algorithmArn:CreatePredictor'
, createPredictor_algorithmArn
- The Amazon Resource Name (ARN) of the algorithm to use for model
training. Required if PerformAutoML
is not set to true
.
Supported algorithms:
arn:aws:forecast:::algorithm/ARIMA
arn:aws:forecast:::algorithm/CNN-QR
arn:aws:forecast:::algorithm/Deep_AR_Plus
arn:aws:forecast:::algorithm/ETS
arn:aws:forecast:::algorithm/NPTS
arn:aws:forecast:::algorithm/Prophet
$sel:hPOConfig:CreatePredictor'
, createPredictor_hPOConfig
- Provides hyperparameter override values for the algorithm. If you don't
provide this parameter, Amazon Forecast uses default values. The
individual algorithms specify which hyperparameters support
hyperparameter optimization (HPO). For more information, see
aws-forecast-choosing-recipes.
If you included the HPOConfig
object, you must set PerformHPO
to
true.
$sel:optimizationMetric:CreatePredictor'
, createPredictor_optimizationMetric
- The accuracy metric used to optimize the predictor.
$sel:autoMLOverrideStrategy:CreatePredictor'
, createPredictor_autoMLOverrideStrategy
- The LatencyOptimized
AutoML override strategy is only available in
private beta. Contact AWS Support or your account manager to learn more
about access privileges.
Used to overide the default AutoML strategy, which is to optimize
predictor accuracy. To apply an AutoML strategy that minimizes training
time, use LatencyOptimized
.
This parameter is only valid for predictors trained using AutoML.
$sel:evaluationParameters:CreatePredictor'
, createPredictor_evaluationParameters
- Used to override the default evaluation parameters of the specified
algorithm. Amazon Forecast evaluates a predictor by splitting a dataset
into training data and testing data. The evaluation parameters define
how to perform the split and the number of iterations.
$sel:encryptionConfig:CreatePredictor'
, createPredictor_encryptionConfig
- An AWS Key Management Service (KMS) key and the AWS Identity and Access
Management (IAM) role that Amazon Forecast can assume to access the key.
$sel:forecastTypes:CreatePredictor'
, createPredictor_forecastTypes
- Specifies the forecast types used to train a predictor. You can specify
up to five forecast types. Forecast types can be quantiles from 0.01 to
0.99, by increments of 0.01 or higher. You can also specify the mean
forecast with mean
.
The default value is ["0.10", "0.50", "0.9"]
.
$sel:performHPO:CreatePredictor'
, createPredictor_performHPO
- Whether to perform hyperparameter optimization (HPO). HPO finds optimal
hyperparameter values for your training data. The process of performing
HPO is known as running a hyperparameter tuning job.
The default value is false
. In this case, Amazon Forecast uses default
hyperparameter values from the chosen algorithm.
To override the default values, set PerformHPO
to true
and,
optionally, supply the HyperParameterTuningJobConfig object. The tuning
job specifies a metric to optimize, which hyperparameters participate in
tuning, and the valid range for each tunable hyperparameter. In this
case, you are required to specify an algorithm and PerformAutoML
must
be false.
The following algorithms support HPO:
- DeepAR+
- CNN-QR
$sel:tags:CreatePredictor'
, createPredictor_tags
- The optional metadata that you apply to the predictor to help you
categorize and organize them. Each tag consists of a key and an optional
value, both of which you define.
The following basic restrictions apply to tags:
- Maximum number of tags per resource - 50.
- For each resource, each tag key must be unique, and each tag key can have only one value.
- Maximum key length - 128 Unicode characters in UTF-8.
- Maximum value length - 256 Unicode characters in UTF-8.
- If your tagging schema is used across multiple services and resources, remember that other services may have restrictions on allowed characters. Generally allowed characters are: letters, numbers, and spaces representable in UTF-8, and the following characters: + - = . _ : / @.
- Tag keys and values are case sensitive.
- Do not use
aws:
,AWS:
, or any upper or lowercase combination of such as a prefix for keys as it is reserved for AWS use. You cannot edit or delete tag keys with this prefix. Values can have this prefix. If a tag value hasaws
as its prefix but the key does not, then Forecast considers it to be a user tag and will count against the limit of 50 tags. Tags with only the key prefix ofaws
do not count against your tags per resource limit.
$sel:predictorName:CreatePredictor'
, createPredictor_predictorName
- A name for the predictor.
$sel:forecastHorizon:CreatePredictor'
, createPredictor_forecastHorizon
- Specifies the number of time-steps that the model is trained to predict.
The forecast horizon is also called the prediction length.
For example, if you configure a dataset for daily data collection (using
the DataFrequency
parameter of the CreateDataset operation) and set
the forecast horizon to 10, the model returns predictions for 10 days.
The maximum forecast horizon is the lesser of 500 time-steps or 1/3 of the TARGET_TIME_SERIES dataset length.
$sel:inputDataConfig:CreatePredictor'
, createPredictor_inputDataConfig
- Describes the dataset group that contains the data to use to train the
predictor.
$sel:featurizationConfig:CreatePredictor'
, createPredictor_featurizationConfig
- The featurization configuration.
Request Lenses
createPredictor_performAutoML :: Lens' CreatePredictor (Maybe Bool) Source #
Whether to perform AutoML. When Amazon Forecast performs AutoML, it evaluates the algorithms it provides and chooses the best algorithm and configuration for your training dataset.
The default value is false
. In this case, you are required to specify
an algorithm.
Set PerformAutoML
to true
to have Amazon Forecast perform AutoML.
This is a good option if you aren't sure which algorithm is suitable
for your training data. In this case, PerformHPO
must be false.
createPredictor_trainingParameters :: Lens' CreatePredictor (Maybe (HashMap Text Text)) Source #
The hyperparameters to override for model training. The hyperparameters that you can override are listed in the individual algorithms. For the list of supported algorithms, see aws-forecast-choosing-recipes.
createPredictor_algorithmArn :: Lens' CreatePredictor (Maybe Text) Source #
The Amazon Resource Name (ARN) of the algorithm to use for model
training. Required if PerformAutoML
is not set to true
.
Supported algorithms:
arn:aws:forecast:::algorithm/ARIMA
arn:aws:forecast:::algorithm/CNN-QR
arn:aws:forecast:::algorithm/Deep_AR_Plus
arn:aws:forecast:::algorithm/ETS
arn:aws:forecast:::algorithm/NPTS
arn:aws:forecast:::algorithm/Prophet
createPredictor_hPOConfig :: Lens' CreatePredictor (Maybe HyperParameterTuningJobConfig) Source #
Provides hyperparameter override values for the algorithm. If you don't provide this parameter, Amazon Forecast uses default values. The individual algorithms specify which hyperparameters support hyperparameter optimization (HPO). For more information, see aws-forecast-choosing-recipes.
If you included the HPOConfig
object, you must set PerformHPO
to
true.
createPredictor_optimizationMetric :: Lens' CreatePredictor (Maybe OptimizationMetric) Source #
The accuracy metric used to optimize the predictor.
createPredictor_autoMLOverrideStrategy :: Lens' CreatePredictor (Maybe AutoMLOverrideStrategy) Source #
The LatencyOptimized
AutoML override strategy is only available in
private beta. Contact AWS Support or your account manager to learn more
about access privileges.
Used to overide the default AutoML strategy, which is to optimize
predictor accuracy. To apply an AutoML strategy that minimizes training
time, use LatencyOptimized
.
This parameter is only valid for predictors trained using AutoML.
createPredictor_evaluationParameters :: Lens' CreatePredictor (Maybe EvaluationParameters) Source #
Used to override the default evaluation parameters of the specified algorithm. Amazon Forecast evaluates a predictor by splitting a dataset into training data and testing data. The evaluation parameters define how to perform the split and the number of iterations.
createPredictor_encryptionConfig :: Lens' CreatePredictor (Maybe EncryptionConfig) Source #
An AWS Key Management Service (KMS) key and the AWS Identity and Access Management (IAM) role that Amazon Forecast can assume to access the key.
createPredictor_forecastTypes :: Lens' CreatePredictor (Maybe (NonEmpty Text)) Source #
Specifies the forecast types used to train a predictor. You can specify
up to five forecast types. Forecast types can be quantiles from 0.01 to
0.99, by increments of 0.01 or higher. You can also specify the mean
forecast with mean
.
The default value is ["0.10", "0.50", "0.9"]
.
createPredictor_performHPO :: Lens' CreatePredictor (Maybe Bool) Source #
Whether to perform hyperparameter optimization (HPO). HPO finds optimal hyperparameter values for your training data. The process of performing HPO is known as running a hyperparameter tuning job.
The default value is false
. In this case, Amazon Forecast uses default
hyperparameter values from the chosen algorithm.
To override the default values, set PerformHPO
to true
and,
optionally, supply the HyperParameterTuningJobConfig object. The tuning
job specifies a metric to optimize, which hyperparameters participate in
tuning, and the valid range for each tunable hyperparameter. In this
case, you are required to specify an algorithm and PerformAutoML
must
be false.
The following algorithms support HPO:
- DeepAR+
- CNN-QR
createPredictor_tags :: Lens' CreatePredictor (Maybe [Tag]) Source #
The optional metadata that you apply to the predictor to help you categorize and organize them. Each tag consists of a key and an optional value, both of which you define.
The following basic restrictions apply to tags:
- Maximum number of tags per resource - 50.
- For each resource, each tag key must be unique, and each tag key can have only one value.
- Maximum key length - 128 Unicode characters in UTF-8.
- Maximum value length - 256 Unicode characters in UTF-8.
- If your tagging schema is used across multiple services and resources, remember that other services may have restrictions on allowed characters. Generally allowed characters are: letters, numbers, and spaces representable in UTF-8, and the following characters: + - = . _ : / @.
- Tag keys and values are case sensitive.
- Do not use
aws:
,AWS:
, or any upper or lowercase combination of such as a prefix for keys as it is reserved for AWS use. You cannot edit or delete tag keys with this prefix. Values can have this prefix. If a tag value hasaws
as its prefix but the key does not, then Forecast considers it to be a user tag and will count against the limit of 50 tags. Tags with only the key prefix ofaws
do not count against your tags per resource limit.
createPredictor_predictorName :: Lens' CreatePredictor Text Source #
A name for the predictor.
createPredictor_forecastHorizon :: Lens' CreatePredictor Int Source #
Specifies the number of time-steps that the model is trained to predict. The forecast horizon is also called the prediction length.
For example, if you configure a dataset for daily data collection (using
the DataFrequency
parameter of the CreateDataset operation) and set
the forecast horizon to 10, the model returns predictions for 10 days.
The maximum forecast horizon is the lesser of 500 time-steps or 1/3 of the TARGET_TIME_SERIES dataset length.
createPredictor_inputDataConfig :: Lens' CreatePredictor InputDataConfig Source #
Describes the dataset group that contains the data to use to train the predictor.
createPredictor_featurizationConfig :: Lens' CreatePredictor FeaturizationConfig Source #
The featurization configuration.
Destructuring the Response
data CreatePredictorResponse Source #
See: newCreatePredictorResponse
smart constructor.
CreatePredictorResponse' | |
|
Instances
newCreatePredictorResponse Source #
Create a value of CreatePredictorResponse
with all optional fields omitted.
Use generic-lens or optics to modify other optional fields.
The following record fields are available, with the corresponding lenses provided for backwards compatibility:
$sel:predictorArn:CreatePredictorResponse'
, createPredictorResponse_predictorArn
- The Amazon Resource Name (ARN) of the predictor.
$sel:httpStatus:CreatePredictorResponse'
, createPredictorResponse_httpStatus
- The response's http status code.
Response Lenses
createPredictorResponse_predictorArn :: Lens' CreatePredictorResponse (Maybe Text) Source #
The Amazon Resource Name (ARN) of the predictor.
createPredictorResponse_httpStatus :: Lens' CreatePredictorResponse Int Source #
The response's http status code.