Chapter 4 Understand Data

Understand your building raw materials can help you choose correct tools and make the most use of them to construct your ideal buildings.

Understand data is the foundation for solving analytical problems. The two major purposes of understand data are:

1. Access data quantity
2. Access data quality
3. Set up objects for data preprocess

In practice the two initial data assessments can be done together or separately. The purpose of them is to setup objective for data preprocess to accomplish. The methods used to understand data can be both Descriptive analysis and Exploratory analysis.