Learning Julia

DataFrames – tabular data structures

Arguably, this is the most important and commonly used data type in statistical computing, whether it is in R (data.frame) or Python (Pandas). This is due to the fact that all the real-world data is mostly in a tabular or spreadsheet-like format. This cannot be represented by a simple DataArray.

To use DataFrames, add the DataFrames package from the registered packages of Julia:

julia> Pkg.update()julia> Pkg.add("DataFrames")julia> using DataFrame

Let’s start by creating a simple data frame:

julia> df = DataFrame(Name = ["Julia", "Python"], Version = [0.5, 3.6])2×2 DataFrames.DataFrame│ Row │ Name     │ Version │├─────┼──────────┼─────────┤│ 1   │ "Julia"  │ 0.5     ││ 2   │ "Python" │ 3.6     │

This dataset, for example, ...