| Interface | Description | 
|---|---|
| MultivariateStatisticalSummary | 
 Trait for multivariate statistical summary of a data matrix. 
 | 
| Class | Description | 
|---|---|
| KernelDensity | 
 Kernel density estimation. 
 | 
| MultivariateOnlineSummarizer | 
 MultivariateOnlineSummarizer implements  
MultivariateStatisticalSummary to 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. 
 |