{"action":"created","comment":{"url":"https://api.github.com/repos/scikit-learn/scikit-learn/pulls/comments/78913149","id":78913149,"diff_hunk":"@@ -34,38 +34,38 @@ class KernelPCA(BaseEstimator, TransformerMixin):\n     degree : int, default=3\n         Degree for poly kernels. Ignored by other kernels.\n \n-    gamma : float, optional\n-        Kernel coefficient for rbf and poly kernels. Default: 1/n_features.\n-        Ignored by other kernels.\n+    gamma : float, default=1/n_features\n+        Kernel coefficient for rbf and poly kernels. Ignored by other\n+        kernels.\n \n-    coef0 : float, optional\n+    coef0 : float, default=1\n         Independent term in poly and sigmoid kernels.\n         Ignored by other kernels.\n \n-    kernel_params : mapping of string to any, optional\n+    kernel_params : mapping of string to any, default=None\n         Parameters (keyword arguments) and values for kernel passed as\n         callable object. Ignored by other kernels.\n \n-    alpha : int, default=1.0\n+    alpha: int, default=1.0\n         Hyperparameter of the ridge regression that learns the\n         inverse transform (when fit_inverse_transform=True).\n \n-    fit_inverse_transform : bool, default=False\n+    fit_inverse_transform: bool, default=False\n         Learn the inverse transform for non-precomputed kernels.\n         (i.e. learn to find the pre-image of a point)\n \n-    eigen_solver : string ['auto'|'dense'|'arpack']\n-        Select eigensolver to use. If n_components is much less than\n+    eigen_solver: string ['auto'|'dense'|'arpack'], default='auto'\n+        Select eigensolver to use.  If n_components is much less than\n         the number of training samples, arpack may be more efficient","path":"sklearn/decomposition/kernel_pca.py","position":null,"original_position":35,"commit_id":"a9c6156d735acfad7a0b63a60f2c0b7f2030af80","original_commit_id":"dbeae361a2003f03fae24f369eeeab352bb09f72","user":{"login":"hlin117","id":1865885,"avatar_url":"https://avatars.githubusercontent.com/u/1865885?v=3","gravatar_id":"","url":"https://api.github.com/users/hlin117","html_url":"https://github.com/hlin117","followers_url":"https://api.github.com/users/hlin117/followers","following_url":"https://api.github.com/users/hlin117/following{/other_user}","gists_url":"https://api.github.com/users/hlin117/gists{/gist_id}","starred_url":"https://api.github.com/users/hlin117/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/hlin117/subscriptions","organizations_url":"https://api.github.com/users/hlin117/orgs","repos_url":"https://api.github.com/users/hlin117/repos","events_url":"https://api.github.com/users/hlin117/events{/privacy}","received_events_url":"https://api.github.com/users/hlin117/received_events","type":"User","site_admin":false},"body":"I think it seems okay as is. \"arpack\" is referring to the string, while arpack is referring to the library.","created_at":"2016-09-15T08:32:20Z","updated_at":"2016-09-15T08:32:20Z","html_url":"https://github.com/scikit-learn/scikit-learn/pull/6035#discussion_r78913149","pull_request_url":"https://api.github.com/repos/scikit-learn/scikit-learn/pulls/6035","_links":{"self":{"href":"https://api.github.com/repos/scikit-learn/scikit-learn/pulls/comments/78913149"},"html":{"href":"https://github.com/scikit-learn/scikit-learn/pull/6035#discussion_r78913149"},"pull_request":{"href":"https://api.github.com/repos/scikit-learn/scikit-learn/pulls/6035"}}},"pull_request":{"url":"https://api.github.com/repos/scikit-learn/scikit-learn/pulls/6035","id":53653101,"html_url":"https://github.com/scikit-learn/scikit-learn/pull/6035","diff_url":"https://github.com/scikit-learn/scikit-learn/pull/6035.diff","patch_url":"https://github.com/scikit-learn/scikit-learn/pull/6035.patch","issue_url":"https://api.github.com/repos/scikit-learn/scikit-learn/issues/6035","number":6035,"state":"open","locked":false,"title":"[MRG] Default attribute info for KernelPCA","user":{"login":"hlin117","id":1865885,"avatar_url":"https://avatars.githubusercontent.com/u/1865885?v=3","gravatar_id":"","url":"https://api.github.com/users/hlin117","html_url":"https://github.com/hlin117","followers_url":"https://api.github.com/users/hlin117/followers","following_url":"https://api.github.com/users/hlin117/following{/other_user}","gists_url":"https://api.github.com/users/hlin117/gists{/gist_id}","starred_url":"https://api.github.com/users/hlin117/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/hlin117/subscriptions","organizations_url":"https://api.github.com/users/hlin117/orgs","repos_url":"https://api.github.com/users/hlin117/repos","events_url":"https://api.github.com/users/hlin117/events{/privacy}","received_events_url":"https://api.github.com/users/hlin117/received_events","type":"User","site_admin":false},"body":"Added some default attribute information to the KernelPCA. I also added very minimal changes to the rest of the 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