Modifying a dataset

Looking over the data variables available in your notes, you should be able to get a sense of what information is available in each data entry and what information might be useful to you. Once you have observed the contents of a dataset, modification of the data is naturally what comes next. Here are some examples of changes that you might make:

• Extracting particular data variables
• Merging data sources
• Converting between formats
• Restructuring the data
• Removing outliers
• Correcting errors

In this exercise, I'm just going to extract some data variables from the original dataset, specifically the following:

• address
• created_at
• description
• lng
• lat
• rating

Extracting data variables from the original dataset

In the following steps, you will iterate through the data entries of the original dataset using a for loop. For each of the individual entries, you will collect the previously mentioned variables into a new data entry and place the new data entries in to an array.

As is done in the following...