| Interface | Description | 
|---|---|
| MultivariateStatisticalSummary | Trait for multivariate statistical summary of a data matrix. | 
| Class | Description | 
|---|---|
| KernelDensity | Kernel density estimation. | 
| MultivariateOnlineSummarizer | MultivariateOnlineSummarizer implements  MultivariateStatisticalSummaryto compute the mean,
 variance, minimum, maximum, counts, and nonzero counts for instances in sparse or dense vector
 format in an online fashion. | 
| Statistics | API for statistical functions in MLlib. |