Bag of Words

Overview

You can use this Snap to vectorizes sentences into a set of numeric fields. It takes two inputs:

  • An array of tokenized words extracted from a set of input sentences. If your sentences are not already tokenized, use the Tokenizer Snap.
  • A document containing the most common words in the training set. You can generate this document using the Common Words Snap.

The Snap then processes the received data and outputs a frequency count of the most common words in each sentence. For instance, consider the following scenario: The first input consists of token arrays representing sentences in a dataset, and the second input contains the frequency of the top 100 common words. This Snap enables you to list the number of times each common word appears in each input sentence.


Bag of Words Snap

Prerequisites

None.

Limitations and known issues

None.

Snap views

View Description Examples of upstream and downstream Snaps
Input #1 This Snap has at the most two document input views and it requires an array of tokenized words drawn from a set of input sentences. If your sentences are not already tokenized, use the Tokenizer Snap.
Input #2 A document containing the most common words in the training set. You can generate this document with the Common Words Snap.
Output This Snap has at the most one document output view. A document containing the frequency of the most common words in the text field.
Error

Error handling is a generic way to handle errors without losing data or failing the Snap execution. You can handle the errors that the Snap might encounter when running the pipeline by choosing one of the following options from the When errors occur list under the Views tab. The available options are:

  • Stop Pipeline Execution Stops the current pipeline execution when an error occurs.
  • Discard Error Data and Continue Ignores the error, discards that record, and continues with the remaining records.
  • Route Error Data to Error View Routes the error data to an error view without stopping the Snap execution.

Learn more about Error handling in Pipelines.

Snap settings

Note:
  • Suggestion icon (): Indicates a list that is dynamically populated based on the configuration.
  • Expression icon (): Indicates whether the value is an expression (if enabled) or a static value (if disabled). Learn more about Using Expressions in SnapLogic.
  • Add icon (Plus Icon): Indicates that you can add fields in the field set.
  • Remove icon (Minus Icon): Indicates that you can remove fields from the field set.
Field / Field set Type Description
Label String

Required. Specify a unique name for the Snap. Modify this to be more appropriate, especially if more than one of the same Snaps is in the pipeline.

Default value: Bag of words

Example: Customer review
Token array String/Suggestion

Required. Specify the array of tokens. Alternatively, you can click the Suggestions icon () to view a list of values and select a value.

Default value: N/A

Example: $text
Snap execution Dropdown list
Select one of the three modes in which the Snap executes. Available options are:
  • Validate & Execute: Performs limited execution of the Snap and generates a data preview during pipeline validation. Subsequently, performs full execution of the Snap (unlimited records) during pipeline runtime.
  • Execute only: Performs full execution of the Snap during pipeline execution without generating preview data.
  • Disabled: Disables the Snap and all Snaps that are downstream from it.

Default value: Validate & Execute

Example: Execute only

Examples