1  using DataFrames
 2  
 3  """
 4      df2string(DataFrame)
 5  
 6  Convert the data type of all columns in the DataFrame to **String**.
 7  
 8  This function depends on these packages:
 9  - DataFrames
10  
11  The input argument must be a **DataFrame**.
12  
13  # Examples
14  ```julia-repl
15  julia> dfStringType = df2string(df)
16  [ Info: Converting contents of Dataframe to String data type...
17  110×9 DataFrame
18          .
19          .
20          .
21  
22  ```
23  """
24  function df2string(df::DataFrame)
25      @info "Converting contents of Dataframe to String data type..."
26      mapcols!(col -> string.(col), df)
27      return df
28  end