This is a short summary of data science concepts I wrote for undergraduate students at Temple University.

Data are records that contain facts about some phenomenon. The data can be unstructured such as natural language writings and images or structured such as weather readings and stock prices. The structure of the data is stored as metadata, that is, data about data. Metadata can often be found as a data dictionary that describes a dataset by defining a label, data type and a short description for each column (variable) in the dataset. …

Aleksi Aaltonen

Entrepreneur, MIS scholar and thinker with thirty years of experience in digital technology — www.aleksi.info

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