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Author Archives: Anonymous

To convert a wide DataFrame (one column per metric) to long…

To convert a wide DataFrame (one column per metric) to long format (one row per observation):

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A data warehouse is best characterized as:

A data warehouse is best characterized as:

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In a Bag-of-Words representation, each entry of the vector f…

In a Bag-of-Words representation, each entry of the vector for a document is:

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In NLP, “tokens” vs “types”:

In NLP, “tokens” vs “types”:

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A key limitation shared by Bag-of-Words AND TF-IDF (without…

A key limitation shared by Bag-of-Words AND TF-IDF (without further engineering):

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In a MapReduce-style computation, the Map step:

In a MapReduce-style computation, the Map step:

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To create an animated chart with a play button for a time-se…

To create an animated chart with a play button for a time-series:

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TF-IDF up-weights words that:

TF-IDF up-weights words that:

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Forward fill (ffill) is most appropriate for missing values…

Forward fill (ffill) is most appropriate for missing values in:

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For a sentiment-analysis task, why might lower-casing the te…

For a sentiment-analysis task, why might lower-casing the text hurt accuracy?

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