FateWithShellmiaoComment/Fate/doc/federatedml_component/statistic.md

Data Statistic

This component will do some statistical work on the data, including statistical mean, maximum and minimum, median, etc.

The indicators for each column that can be statistic are list as follow.

1. count: Number of data
2. sum: The sum of this column
3. mean: The mean of this column
4. variance/stddev: Variance and standard deviation of this column
5. median: Median of this column
6. min/max: Min and Max value of this column
7. coefficient of variance: The formula is abs(stddev / mean)
8. missing_count/missing_ratio: Number and ratio of missing value in this column
9. skewness: The definition can be referred to here
10. kurtosis: The definition can be referred to here
11. percentile: The value of percentile. Accept 0% to 100% while the number before the "%" should be integer.

These static values can be used in feature selection as a criterion.