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From iyerr3 <...@git.apache.org>
Subject [GitHub] incubator-madlib pull request: misc doc changes for 1 dot 9
Date Sat, 26 Mar 2016 00:19:37 GMT
Github user iyerr3 commented on a diff in the pull request:

--- Diff: src/ports/postgres/modules/pca/pca.sql_in ---
@@ -324,13 +341,20 @@ string should be double-quoted; in this case the input would be
'"MyTable"').
\ref background_pca "Technical Background"), sparse matrices almost always
become dense during the training process. Thus, this implementation
automatically densifies sparse matrix input, and there should be no expected
- performance improvement in using sparse matrix input over dense matrix input.
-
-- If both <em>lanczos_iter</em> and proportion of variance (via the
-<em>grouping_cols</em>) is defined, <em>lanczos_iter</em> will

-take precedence in determining the number of principal components (i.e. the
-number of principal components will not be greater than <em>lanczos_iter</em>

-even if the target proportion is not reached).
+performance improvement in using sparse matrix input over dense matrix input.
+
+- For the parameter 'components_param', INTEGER and FLOAT are
+interpreted differently.  A special case to be aware of:
+'components_param' = 1 (INTEGER) will return 1 principle
--- End diff --

again, principle -> principal

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