---
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title: "MLlib: RDD-based API"
displayTitle: "MLlib: RDD-based API"
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This page documents sections of the MLlib guide for the RDD-based API (the `spark.mllib` package).
Please see the [MLlib Main Guide](ml-guide.html) for the DataFrame-based API (the `spark.ml` package),
which is now the primary API for MLlib.

* [Data types](mllib-data-types.html)
* [Basic statistics](mllib-statistics.html)
  * [summary statistics](mllib-statistics.html#summary-statistics)
  * [correlations](mllib-statistics.html#correlations)
  * [stratified sampling](mllib-statistics.html#stratified-sampling)
  * [hypothesis testing](mllib-statistics.html#hypothesis-testing)
  * [streaming significance testing](mllib-statistics.html#streaming-significance-testing)
  * [random data generation](mllib-statistics.html#random-data-generation)
* [Classification and regression](mllib-classification-regression.html)
  * [linear models (SVMs, logistic regression, linear regression)](mllib-linear-methods.html)
  * [naive Bayes](mllib-naive-bayes.html)
  * [decision trees](mllib-decision-tree.html)
  * [ensembles of trees (Random Forests and Gradient-Boosted Trees)](mllib-ensembles.html)
  * [isotonic regression](mllib-isotonic-regression.html)
* [Collaborative filtering](mllib-collaborative-filtering.html)
  * [alternating least squares (ALS)](mllib-collaborative-filtering.html#collaborative-filtering)
* [Clustering](mllib-clustering.html)
  * [k-means](mllib-clustering.html#k-means)
  * [Gaussian mixture](mllib-clustering.html#gaussian-mixture)
  * [power iteration clustering (PIC)](mllib-clustering.html#power-iteration-clustering-pic)
  * [latent Dirichlet allocation (LDA)](mllib-clustering.html#latent-dirichlet-allocation-lda)
  * [bisecting k-means](mllib-clustering.html#bisecting-kmeans)
  * [streaming k-means](mllib-clustering.html#streaming-k-means)
* [Dimensionality reduction](mllib-dimensionality-reduction.html)
  * [singular value decomposition (SVD)](mllib-dimensionality-reduction.html#singular-value-decomposition-svd)
  * [principal component analysis (PCA)](mllib-dimensionality-reduction.html#principal-component-analysis-pca)
* [Feature extraction and transformation](mllib-feature-extraction.html)
* [Frequent pattern mining](mllib-frequent-pattern-mining.html)
  * [FP-growth](mllib-frequent-pattern-mining.html#fp-growth)
  * [association rules](mllib-frequent-pattern-mining.html#association-rules)
  * [PrefixSpan](mllib-frequent-pattern-mining.html#prefix-span)
* [Evaluation metrics](mllib-evaluation-metrics.html)
* [PMML model export](mllib-pmml-model-export.html)
* [Optimization (developer)](mllib-optimization.html)
  * [stochastic gradient descent](mllib-optimization.html#stochastic-gradient-descent-sgd)
  * [limited-memory BFGS (L-BFGS)](mllib-optimization.html#limited-memory-bfgs-l-bfgs)