spark git commit: [SPARK-9191] [ML] [Doc] Add ml.PCA user guide and code examples

Repository: spark Updated Branches: refs/heads/branch-1.5 dc0c8c982 -> e7329ab31 [SPARK-9191] [ML] [Doc] Add ml.PCA user guide and code examples Add ml.PCA user guide document and code examples for Scala/Java/Python. Author: Yanbo Liang Closes #7522 from yanboliang/ml-pca-md and squashes th

spark git commit: [SPARK-9191] [ML] [Doc] Add ml.PCA user guide and code examples

Repository: spark Updated Branches: refs/heads/master ba1c4e138 -> 8ca287ebb [SPARK-9191] [ML] [Doc] Add ml.PCA user guide and code examples Add ml.PCA user guide document and code examples for Scala/Java/Python. Author: Yanbo Liang Closes #7522 from yanboliang/ml-pca-md and squashes the fo