{"action":"created","comment":{"url":"https://api.github.com/repos/dotnet/docs/pulls/comments/273724996","pull_request_review_id":224668597,"id":273724996,"node_id":"MDI0OlB1bGxSZXF1ZXN0UmV2aWV3Q29tbWVudDI3MzcyNDk5Ng==","diff_hunk":"@@ -1,168 +1,103 @@\n ---\n-title: Machine learning data transforms - ML.NET\n+title: Data transformations | ML.NET\n description: Explore the feature engineering components supported in ML.NET.\n-author: JRAlexander\n-ms.custom: seodec18\n-ms.date: 01/14/2019\n+author: nake\n+ms.date: 04/02/2019\n ---\n \n-# Machine learning data transforms - ML.NET\n+# Data transformations\n \n-The following tables contain information about all of the data transforms supported in ML.NET.\n+Chain data transformations together to prepare data for model training. All of the transformations in this guide return classes that implement the `IEstimator` interface. The specific implementation determines the type and format of data that the transformer expects from the previous element in the chain, and also the type and format of data that is produced by the transformation.\n \n-> [!NOTE]\n-> ML.NET is currently in Preview. Not all data transforms are currently supported. To submit a request for a certain transform, open an issue in the [dotnet/machinelearning](https://github.com/dotnet/machinelearning/issues) GitHub repository.\n+Some data transformations require training data to calculate their parameters. For example: the <xref:Microsoft.ML.NormalizationCatalog.NormalizeMeanVariance%2A> transformer calculates the mean and variance of the training data during the `Fit()` operation, and uses those parameters in the `Transform()` operation. \n \n-## Combiners and segregators\n+Some data transformations do not require training data. For example: the <xref:Microsoft.ML.ImageEstimatorsCatalog.ConvertToGrayscale*> transformation can perform the `Transform()` operation without having seen any training data during the `Fit()` 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contractions: \"don't\"","created_at":"2019-04-09T22:10:55Z","updated_at":"2019-04-09T22:11:43Z","html_url":"https://github.com/dotnet/docs/pull/11699#discussion_r273724996","pull_request_url":"https://api.github.com/repos/dotnet/docs/pulls/11699","author_association":"CONTRIBUTOR","_links":{"self":{"href":"https://api.github.com/repos/dotnet/docs/pulls/comments/273724996"},"html":{"href":"https://github.com/dotnet/docs/pull/11699#discussion_r273724996"},"pull_request":{"href":"https://api.github.com/repos/dotnet/docs/pulls/11699"}}},"pull_request":{"url":"https://api.github.com/repos/dotnet/docs/pulls/11699","id":267965790,"node_id":"MDExOlB1bGxSZXF1ZXN0MjY3OTY1Nzkw","html_url":"https://github.com/dotnet/docs/pull/11699","diff_url":"https://github.com/dotnet/docs/pull/11699.diff","patch_url":"https://github.com/dotnet/docs/pull/11699.patch","issue_url":"https://api.github.com/repos/dotnet/docs/issues/11699","number":11699,"state":"open","locked":false,"title":"WIP ML.NET Add new transforms and update existing ones","user":{"login":"natke","id":3302433,"node_id":"MDQ6VXNlcjMzMDI0MzM=","avatar_url":"https://avatars1.githubusercontent.com/u/3302433?v=4","gravatar_id":"","url":"https://api.github.com/users/natke","html_url":"https://github.com/natke","followers_url":"https://api.github.com/users/natke/followers","following_url":"https://api.github.com/users/natke/following{/other_user}","gists_url":"https://api.github.com/users/natke/gists{/gist_id}","starred_url":"https://api.github.com/users/natke/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/natke/subscriptions","organizations_url":"https://api.github.com/users/natke/orgs","repos_url":"https://api.github.com/users/natke/repos","events_url":"https://api.github.com/users/natke/events{/privacy}","received_events_url":"https://api.github.com/users/natke/received_events","type":"User","site_admin":false},"body":"## Summary\r\n\r\nUpdate list of ML.NET transformers\r\n\r\nPreview: https://review.docs.microsoft.com/en-us/dotnet/machine-learning/resources/transforms?branch=pr-en-us-11699\r\n\r\n[AB#1494816](https://dev.azure.com/mseng/677da0fb-b067-4f77-b89b-f32c12bb8617/_workitems/edit/1494816)\r\n","created_at":"2019-04-05T21:08:23Z","updated_at":"2019-04-09T22:11:43Z","closed_at":null,"merged_at":null,"merge_commit_sha":"bab26d151a2706562da841e4e6c49e825bec823e","assignee":{"login":"natke","id":3302433,"node_id":"MDQ6VXNlcjMzMDI0MzM=","avatar_url":"https://avatars1.githubusercontent.com/u/3302433?v=4","gravatar_id":"","url":"https://api.github.com/users/natke","html_url":"https://github.com/natke","followers_url":"https://api.github.com/users/natke/followers","following_url":"https://api.github.com/users/natke/following{/other_user}","gists_url":"https://api.github.com/users/natke/gists{/gist_id}","starred_url":"https://api.github.com/users/natke/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/natke/subscriptions","organizations_url":"https://api.github.com/users/natke/orgs","repos_url":"https://api.github.com/users/natke/repos","events_url":"https://api.github.com/users/natke/events{/privacy}","received_events_url":"https://api.github.com/users/natke/received_events","type":"User","site_admin":false},"assignees":[{"login":"natke","id":3302433,"node_id":"MDQ6VXNlcjMzMDI0MzM=","avatar_url":"https://avatars1.githubusercontent.com/u/3302433?v=4","gravatar_id":"","url":"https://api.github.com/users/natke","html_url":"https://github.com/natke","followers_url":"https://api.github.com/users/natke/followers","following_url":"https://api.github.com/users/natke/following{/other_user}","gists_url":"https://api.github.com/users/natke/gists{/gist_id}","starred_url":"https://api.github.com/users/natke/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/natke/subscriptions","organizations_url":"https://api.github.com/users/natke/orgs","repos_url":"https://api.github.com/users/natke/repos","events_url":"https://api.github.com/users/natke/events{/privacy}","received_events_url":"https://api.github.com/users/natke/received_events","type":"User","site_admin":false}],"requested_reviewers":[{"login":"shmoradims","id":15950225,"node_id":"MDQ6VXNlcjE1OTUwMjI1","avatar_url":"https://avatars2.githubusercontent.com/u/15950225?v=4","gravatar_id":"","url":"https://api.github.com/users/shmoradims","html_url":"https://github.com/shmoradims","followers_url":"https://api.github.com/users/shmoradims/followers","following_url":"https://api.github.com/users/shmoradims/following{/other_user}","gists_url":"https://api.github.com/users/shmoradims/gists{/gist_id}","starred_url":"https://api.github.com/users/shmoradims/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/shmoradims/subscriptions","organizations_url":"https://api.github.com/users/shmoradims/orgs","repos_url":"https://api.github.com/users/shmoradims/repos","events_url":"https://api.github.com/users/shmoradims/events{/privacy}","received_events_url":"https://api.github.com/users/shmoradims/received_events","type":"User","site_admin":false},{"login":"sfilipi","id":19392467,"node_id":"MDQ6VXNlcjE5MzkyNDY3","avatar_url":"https://avatars1.githubusercontent.com/u/19392467?v=4","gravatar_id":"","url":"https://api.github.com/users/sfilipi","html_url":"https://github.com/sfilipi","followers_url":"https://api.github.com/users/sfilipi/followers","following_url":"https://api.github.com/users/sfilipi/following{/other_user}","gists_url":"https://api.github.com/users/sfilipi/gists{/gist_id}","starred_url":"https://api.github.com/users/sfilipi/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/sfilipi/subscriptions","organizations_url":"https://api.github.com/users/sfilipi/orgs","repos_url":"https://api.github.com/users/sfilipi/repos","events_url":"https://api.github.com/users/sfilipi/events{/privacy}","received_events_url":"https://api.github.com/users/sfilipi/received_events","type":"User","site_admin":false}],"requested_teams":[],"labels":[{"id":925523939,"node_id":"MDU6TGFiZWw5MjU1MjM5Mzk=","url":"https://api.github.com/repos/dotnet/docs/labels/:books:%20Area%20-%20ML.NET%20Guide","name":":books: 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