Data Visualization

1. Center, Shape, Spread

2. For dummy code, we have to ensure that the data type is Categorical (by astype(category)), otherwise, the result will be meaningless.

3. For Quantitative Variables: Histograms, exact measures of shape, center and Spread

4. For Categorical Variables: Frequency distributions;  Bar Chart

5. 注意，factorplot 中的y 取的是平均值。如果想看回归趋势，应该用regplot