Data Cleaning 5

1. Histogram vs. Bar chart

With bar charts, each column represents a group defined by a categorical variable; And with histograms, each column represents a group defined by a quantitative variable. Which means we can change the order of categories in bar chart. But we can not swap the quantitative variable in histogram.

2.We can use map () combined with dictionary/series to convert our target data to the data We want to.

　　Series = ["Yes", "No", NaN, "yes"] #Origonal Data Set

Yes_no = {"Yes": True, "no": False} # The dictionary we would like-to-convert all the Yes to True, and all the No to Fa LSE

Series = Series.map (yes_no) # Use the map function

3.

Data Cleaning 5