com.salesforce.op.stages.impl.feature
OpHashingTF
Related Doc: package feature
Input Features type
Input Features type
Checks the input length
Checks the input length
input features
true is input size as expected, false otherwise
Check if the stage is serializable
Check if the stage is serializable
Failure if not serializable
This method is used to make a copy of the instance with new parameters in several methods in spark internals Default will find the constructor and make a copy for any class (AS LONG AS ALL CONSTRUCTOR PARAMS ARE VALS, this is why type tags are written as implicit vals in base classes).
This method is used to make a copy of the instance with new parameters in several methods in spark internals Default will find the constructor and make a copy for any class (AS LONG AS ALL CONSTRUCTOR PARAMS ARE VALS, this is why type tags are written as implicit vals in base classes).
Note: that the convention in spark is to have the uid be a constructor argument, so that copies will share a uid with the original (developers should follow this convention).
new parameters want to add to instance
a new instance with the same uid
Gets names of parameters that control input columns for Spark stage
Gets names of parameters that control input columns for Spark stage
Gets an input feature Note: this method IS NOT safe to use outside the driver, please use getTransientFeature method instead
Gets an input feature Note: this method IS NOT safe to use outside the driver, please use getTransientFeature method instead
array of features
NoSuchElementException if the features are not set
RuntimeException in case one of the features is null
Gets the input features Note: this method IS NOT safe to use outside the driver, please use getTransientFeatures method instead
Gets the input features Note: this method IS NOT safe to use outside the driver, please use getTransientFeatures method instead
array of features
NoSuchElementException if the features are not set
RuntimeException in case one of the features is null
Method to access the local version of stage being wrapped
Method to access the local version of stage being wrapped
Option of ml leap runtime version of the spark stage after reloading as local
Output features that will be created by this stage
Output features that will be created by this stage
feature of type OutputFeatures
Gets names of parameters that control output columns for Spark stage
Gets names of parameters that control output columns for Spark stage
Name of output feature (i.e.
Name of output feature (i.e. column created by this stage)
Method to access the spark stage being wrapped
Method to access the spark stage being wrapped
Option of spark ml stage
Gets a save path for wrapped spark stage
Gets a save path for wrapped spark stage
Gets an input feature at index i
Gets an input feature at index i
input index
maybe an input feature
Gets the input Features
Function to convert InputFeatures to an Array of FeatureLike
Function to convert InputFeatures to an Array of FeatureLike
an Array of FeatureLike
name of spark parameter that sets the first input column
name of spark parameter that sets the first input column
Function to be called on getMetadata
Function to be called on getMetadata
Function to be called on setInput
Function to be called on setInput
unique name of the operation this stage performs
unique name of the operation this stage performs
Function to convert OutputFeatures to an Array of FeatureLike
Function to convert OutputFeatures to an Array of FeatureLike
an Array of FeatureLike
Should output feature be a response? Yes, if any of the input features are.
Should output feature be a response? Yes, if any of the input features are.
true if the the output feature should be a response
name of spark parameter that sets the first output column
name of spark parameter that sets the first output column
Binary toggle to control term frequency counts.
Binary toggle to control term frequency counts. If true, all non-zero counts are set to 1. This is useful for discrete probabilistic models that model binary events rather than integer counts. (default = false)
Input features that will be used by the stage
Input features that will be used by the stage
feature of type InputFeatures
Sets input features
Sets input features
feature like type
array of input features
this stage
Number of features.
Number of features. Should be greater than 0. (default = 218)
Sets a save path for wrapped spark stage
Sets a save path for wrapped spark stage
Stage unique name consisting of the stage operation name and uid
Stage unique name consisting of the stage operation name and uid
stage name
This function translates the input and output features into spark schema checks and changes that will occur on the underlying data frame
This function translates the input and output features into spark schema checks and changes that will occur on the underlying data frame
schema of the input data frame
a new schema with the output features added
The spark ML transformer that's being wrapped
The spark ML transformer that's being wrapped
Type tag of the output
Type tag of the output
Type tag of the output value
Type tag of the output value
stage uid
stage uid
Wrapper for org.apache.spark.ml.feature.HashingTF
Maps a sequence of terms to their term frequencies using the hashing trick. Currently we use Austin Appleby's MurmurHash 3 algorithm (MurmurHash3_x86_32) to calculate the hash code value for the term object. Since a simple modulo is used to transform the hash function to a column index, it is advisable to use a power of two as the numFeatures parameter; otherwise the features will not be mapped evenly to the columns.
HashingTF for more info