{"action":"created","comment":{"url":"https://api.github.com/repos/apache/spark/pulls/comments/30280922","id":30280922,"diff_hunk":"@@ -183,6 +183,78 @@ for words_label in wordsDataFrame.select(\"words\", \"label\").take(3):\n </div>\n </div>\n \n+## PolynomialExpansion\n+\n+[Polynomial expansion](http://en.wikipedia.org/wiki/Polynomial_expansion) is the process of expanding your features into a polynomial space, which is formulated by an n-degree combination of original dimensions. A [PolynomialExpansion](api/scala/index.html#org.apache.spark.ml.feature.PolynomialExpansion) class provides this functionality.  The example below shows how to expand your features into a 3-degree polynomial space.\n+\n+Note: We do not provide Python API for `PolynomialExpansion` in this version.\n+\n+<div class=\"codetabs\">\n+<div data-lang=\"scala\" markdown=\"1\">\n+{% highlight scala %}\n+import org.apache.spark.ml.feature.PolynomialExpansion\n+\n+val data = Array(\n+  Vectors.sparse(3, Seq((0, -2.0), (1, 2.3))),\n+  Vectors.dense(-2.0, 2.3),","path":"docs/ml-features.md","position":17,"original_position":17,"commit_id":"81d21dc2b8fc9966ca08cb41dedb26666a3c1f51","original_commit_id":"81d21dc2b8fc9966ca08cb41dedb26666a3c1f51","user":{"login":"jkbradley","id":5084283,"avatar_url":"https://avatars.githubusercontent.com/u/5084283?v=3","gravatar_id":"","url":"https://api.github.com/users/jkbradley","html_url":"https://github.com/jkbradley","followers_url":"https://api.github.com/users/jkbradley/followers","following_url":"https://api.github.com/users/jkbradley/following{/other_user}","gists_url":"https://api.github.com/users/jkbradley/gists{/gist_id}","starred_url":"https://api.github.com/users/jkbradley/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/jkbradley/subscriptions","organizations_url":"https://api.github.com/users/jkbradley/orgs","repos_url":"https://api.github.com/users/jkbradley/repos","events_url":"https://api.github.com/users/jkbradley/events{/privacy}","received_events_url":"https://api.github.com/users/jkbradley/received_events","type":"User","site_admin":false},"body":"Length should match other data.  Also, can the data be made as simple as possible, such as 3 length-2 vectors?  (same for Java example)\r\n\r\nAlternatively, you could load data via MLUtils.loadLibSVMFile","created_at":"2015-05-13T22:02:44Z","updated_at":"2015-05-13T22:02:44Z","html_url":"https://github.com/apache/spark/pull/6113#discussion_r30280922","pull_request_url":"https://api.github.com/repos/apache/spark/pulls/6113","_links":{"self":{"href":"https://api.github.com/repos/apache/spark/pulls/comments/30280922"},"html":{"href":"https://github.com/apache/spark/pull/6113#discussion_r30280922"},"pull_request":{"href":"https://api.github.com/repos/apache/spark/pulls/6113"}}},"pull_request":{"url":"https://api.github.com/repos/apache/spark/pulls/6113","id":35299059,"html_url":"https://github.com/apache/spark/pull/6113","diff_url":"https://github.com/apache/spark/pull/6113.diff","patch_url":"https://github.com/apache/spark/pull/6113.patch","issue_url":"https://api.github.com/repos/apache/spark/issues/6113","number":6113,"state":"open","locked":false,"title":"[SPARK-7581][ml][doc] User guide for spark.ml PolynomialExpansion","user":{"login":"yinxusen","id":2637239,"avatar_url":"https://avatars.githubusercontent.com/u/2637239?v=3","gravatar_id":"","url":"https://api.github.com/users/yinxusen","html_url":"https://github.com/yinxusen","followers_url":"https://api.github.com/users/yinxusen/followers","following_url":"https://api.github.com/users/yinxusen/following{/other_user}","gists_url":"https://api.github.com/users/yinxusen/gists{/gist_id}","starred_url":"https://api.github.com/users/yinxusen/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/yinxusen/subscriptions","organizations_url":"https://api.github.com/users/yinxusen/orgs","repos_url":"https://api.github.com/users/yinxusen/repos","events_url":"https://api.github.com/users/yinxusen/events{/privacy}","received_events_url":"https://api.github.com/users/yinxusen/received_events","type":"User","site_admin":false},"body":"JIRA [here](https://issues.apache.org/jira/browse/SPARK-7581).\r\n\r\nCC @jkbradley","created_at":"2015-05-13T06:59:19Z","updated_at":"2015-05-13T22:02:44Z","closed_at":null,"merged_at":null,"merge_commit_sha":"f29b69f626fc6d0fe2af9f66d145e17aa43a5f0e","assignee":null,"milestone":null,"commits_url":"https://api.github.com/repos/apache/spark/pulls/6113/commits","review_comments_url":"https://api.github.com/repos/apache/spark/pulls/6113/comments","review_comment_url":"https://api.github.com/repos/apache/spark/pulls/comments{/number}","comments_url":"https://api.github.com/repos/apache/spark/issues/6113/comments","statuses_url":"https://api.github.com/repos/apache/spark/statuses/81d21dc2b8fc9966ca08cb41dedb26666a3c1f51","head":{"label":"yinxusen:SPARK-7581","ref":"SPARK-7581","sha":"81d21dc2b8fc9966ca08cb41dedb26666a3c1f51","user":{"login":"yinxusen","id":2637239,"avatar_url":"https://avatars.githubusercontent.com/u/2637239?v=3","gravatar_id":"","url":"https://api.github.com/users/yinxusen","html_url":"https://github.com/yinxusen","followers_url":"https://api.github.com/users/yinxusen/followers","following_url":"https://api.github.com/users/yinxusen/following{/other_user}","gists_url":"https://api.github.com/users/yinxusen/gists{/gist_id}","starred_url":"https://api.github.com/users/yinxusen/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/yinxusen/subscriptions","organizations_url":"https://api.github.com/users/yinxusen/orgs","repos_url":"https://api.github.com/users/yinxusen/repos","events_url":"https://api.github.com/users/yinxusen/events{/privacy}","received_events_url":"https://api.github.com/users/yinxusen/received_events","type":"User","site_admin":false},"repo":{"id":17233732,"name":"spark","full_name":"yinxusen/spark","owner":{"login":"yinxusen","id":2637239,"avatar_url":"https://avatars.githubusercontent.com/u/2637239?v=3","gravatar_id":"","url":"https://api.github.com/users/yinxusen","html_url":"https://github.com/yinxusen","followers_url":"https://api.github.com/users/yinxusen/followers","following_url":"https://api.github.com/users/yinxusen/following{/other_user}","gists_url":"https://api.github.com/users/yinxusen/gists{/gist_id}","starred_url":"https://api.github.com/users/yinxusen/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/yinxusen/subscriptions","organizations_url":"https://api.github.com/users/yinxusen/orgs","repos_url":"https://api.github.com/users/yinxusen/repos","events_url":"https://api.github.com/users/yinxusen/events{/privacy}","received_events_url":"https://api.github.com/users/yinxusen/received_events","type":"User","site_admin":false},"private":false,"html_url":"https://github.com/yinxusen/spark","description":"Mirror 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