Converting data between DataFrame and Matrix

The DataFrames.jl package provides a vast array of procedures that allow you to manipulate tabular data with rows of heterogeneous types. However, you often have your data stored initially in a matrix. In this recipe, we discuss how you can convert such data to DataFrame. We also show how you can perform the reverse procedure, that is, transform the data from DataFrame to a value of a standard Matrix type available in Julia.

Getting ready

Make sure that you have theDataFrames.jlpackage installed. You can check this by writing this in the Julia command line:

julia> using DataFrames

If this command fails, then add theDataFrames.jlpackage, in accordance with the instructions in the Managing packages recipe in Chapter 1, Installing and Setting Up Julia:

julia> using Pkg; Pkg.add("DataFrames")

Note

In the GitHub repository for this recipe, you will find the commands.txt file, which contains the presented sequence of shell and Julia commands.

Now, open...