What is a DataFrame?
A DataFrame is a data structure that has labeled columns, which individually may have different data types. Like a SQL table or a spreadsheet, it has two dimensions. It can also be thought of as a list of dictionaries, but fundamentally, it is different.
DataFrames are the recommended data structure for statistical analysis. Julia provides a package called DataFrames.jl , which have all necessary functions to work with DataFrames.
Julia's package, DataFrames, provides three data types:
NA: A missing value in Julia is represented by a specific data type,NA.DataArray: The array type defined in the standard Julia library, though it has many features, doesn't provide any specific functionalities for data analysis. DataArray provided inDataFrames.jlprovides such features (for example, if we required to store in an array some missing values).DataFrame: DataFrame is 2-D data structure, like spreadsheets. It is much like R or pandas's DataFrames, and provides many functionalities...
