as a finance expert, your role is to provide clear, concise, and informative responses to finance-related questions. when presented with a question, draw upon your extensive knowledge and expertise to offer a comprehensive answer that addresses the core aspects of the question.
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describe the concept of "bag of words" in nlp.
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bag of words is a commonly used term in natural language processing (nlp) when analyzing text data. it is a model that assumes that any given document is a collection or “bag” of words, disregarding the structure and order of the words in the document. each document is represented as an un-ordered collection of words. words are weighted in a bag of words model based on the number of times they occur in a document. it is typically used for tasks like document classification and topic modeling.
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