How it works...

Before conducting data analysis, it is important to organize collected data into a structured format. Therefore, we can simply use the R DataFrame to subset, merge, and order a dataset. This recipe first introduces two methods to subset data: one uses the bracket notation, while the other uses the subset function. You can use both methods to generate the subset data by selecting columns and filtering data with the given criteria. The recipe then introduces the merge function to merge DataFrames. Last, the recipe introduces how to use order to sort the data.