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Posted to issues@systemml.apache.org by "Deron Eriksson (JIRA)" <ji...@apache.org> on 2017/06/29 21:31:00 UTC
[jira] [Closed] (SYSTEMML-1379) Investigate script metadata to
simplify MLContext script interaction
[ https://issues.apache.org/jira/browse/SYSTEMML-1379?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Deron Eriksson closed SYSTEMML-1379.
------------------------------------
> Investigate script metadata to simplify MLContext script interaction
> --------------------------------------------------------------------
>
> Key: SYSTEMML-1379
> URL: https://issues.apache.org/jira/browse/SYSTEMML-1379
> Project: SystemML
> Issue Type: Improvement
> Components: Algorithms, APIs
> Reporter: Deron Eriksson
> Assignee: Deron Eriksson
> Fix For: Not Applicable
>
>
> Currently many scripts contain usage comments such as the following:
> {code}
> # THIS SCRIPT COMPUTES AN APPROXIMATE FACTORIZATIONOF A LOW-RANK MATRIX X INTO TWO MATRICES U AND V
> # USING ALTERNATING-LEAST-SQUARES (ALS) ALGORITHM WITH CONJUGATE GRADIENT
> # MATRICES U AND V ARE COMPUTED BY MINIMIZING A LOSS FUNCTION (WITH REGULARIZATION)
> #
> # INPUT PARAMETERS:
> # ---------------------------------------------------------------------------------------------
> # NAME TYPE DEFAULT MEANING
> # ---------------------------------------------------------------------------------------------
> # X String --- Location to read the input matrix X to be factorized
> # U String --- Location to write the factor matrix U
> # V String --- Location to write the factor matrix V
> # rank Int 10 Rank of the factorization
> # reg String "L2" Regularization:
> # "L2" = L2 regularization;
> # "wL2" = weighted L2 regularization
> # lambda Double 0.000001 Regularization parameter, no regularization if 0.0
> # maxi Int 50 Maximum number of iterations
> # check Boolean FALSE Check for convergence after every iteration, i.e., updating U and V once
> # thr Double 0.0001 Assuming check is set to TRUE, the algorithm stops and convergence is declared
> # if the decrease in loss in any two consecutive iterations falls below this threshold;
> # if check is FALSE thr is ignored
> # fmt String "text" The output format of the factor matrices L and R, such as "text" or "csv"
> # ---------------------------------------------------------------------------------------------
> # OUTPUT:
> # 1- An m x r matrix U, where r is the factorization rank
> # 2- An r x n matrix V
> #
> # HOW TO INVOKE THIS SCRIPT - EXAMPLE:
> # hadoop jar SystemML.jar -f ALS-CG.dml -nvargs X=INPUT_DIR/X U=OUTPUT_DIR/U V=OUTPUT_DIR/V rank=10 reg="L2" lambda=0.0001 fmt=csv
> {code}
> Comments such as these are difficult to refer to from a programmatic interactive environment such as the Spark Shell. If similar information is provided in a parseable format, such as JSON or XML, it can potentially be parsed and used to provide such information programmatically, such as through the MLContext API in the Spark Shell.
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