[jira] [Commented] (SPARK-20072) Clarify ALS-WR documentation
[
https://issues.apache.org/jira/browse/SPARK-20072?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15942473#comment-15942473
]
chris snow commented on SPARK-20072:
Will do. Thanks Sean.
> Clarify ALS-WR documentation
>
>
> Key: SPARK-20072
> URL: https://issues.apache.org/jira/browse/SPARK-20072
> Project: Spark
> Issue Type: Improvement
> Components: Documentation
>Affects Versions: 2.1.0
>Reporter: chris snow
>Priority: Trivial
>
> https://www.mail-archive.com/user@spark.apache.org/msg62590.html
> The documentation for collaborative filtering is as follows:
> ===
> Scaling of the regularization parameter
> Since v1.1, we scale the regularization parameter lambda in solving
> each least squares problem by the number of ratings the user generated
> in updating user factors, or the number of ratings the product
> received in updating product factors.
> ===
> I find this description confusing, probably because I lack a detailed
> understanding of ALS. The wording suggest that the number of ratings
> change ("generated", "received") during solving the least squares.
> This is how I think I should be interpreting the description:
> ===
> Since v1.1, we scale the regularization parameter lambda when solving
> each least squares problem. When updating the user factors, we scale
> the regularization parameter by the total number of ratings from the
> user. Similarly, when updating the product factors, we scale the
> regularization parameter by the total number of ratings for the
> product.
> ===
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[jira] [Commented] (SPARK-20072) Clarify ALS-WR documentation
[
https://issues.apache.org/jira/browse/SPARK-20072?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15939958#comment-15939958
]
Sean Owen commented on SPARK-20072:
---
Have a read through the rest of the docs and if you collect a few more
comments, OK let's make your suggested updates.
> Clarify ALS-WR documentation
>
>
> Key: SPARK-20072
> URL: https://issues.apache.org/jira/browse/SPARK-20072
> Project: Spark
> Issue Type: Improvement
> Components: Documentation
>Affects Versions: 2.1.0
>Reporter: chris snow
>Priority: Trivial
>
> https://www.mail-archive.com/user@spark.apache.org/msg62590.html
> The documentation for collaborative filtering is as follows:
> ===
> Scaling of the regularization parameter
> Since v1.1, we scale the regularization parameter lambda in solving
> each least squares problem by the number of ratings the user generated
> in updating user factors, or the number of ratings the product
> received in updating product factors.
> ===
> I find this description confusing, probably because I lack a detailed
> understanding of ALS. The wording suggest that the number of ratings
> change ("generated", "received") during solving the least squares.
> This is how I think I should be interpreting the description:
> ===
> Since v1.1, we scale the regularization parameter lambda when solving
> each least squares problem. When updating the user factors, we scale
> the regularization parameter by the total number of ratings from the
> user. Similarly, when updating the product factors, we scale the
> regularization parameter by the total number of ratings for the
> product.
> ===
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[jira] [Commented] (SPARK-20072) Clarify ALS-WR documentation
[
https://issues.apache.org/jira/browse/SPARK-20072?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15938477#comment-15938477
]
chris snow commented on SPARK-20072:
Fair enough. Though this did cause me some grief - I had read and re-read that
paragraph a number of times before posting an email to the user group to verify
if my understanding was correct.
I also appreciate that my suggested rewording could probably be improved a lot.
I fully understand if this ticket should be closed because it doesn't merit the
effort processing it.
> Clarify ALS-WR documentation
>
>
> Key: SPARK-20072
> URL: https://issues.apache.org/jira/browse/SPARK-20072
> Project: Spark
> Issue Type: Improvement
> Components: Documentation
>Affects Versions: 2.1.0
>Reporter: chris snow
>Priority: Trivial
>
> https://www.mail-archive.com/user@spark.apache.org/msg62590.html
> The documentation for collaborative filtering is as follows:
> ===
> Scaling of the regularization parameter
> Since v1.1, we scale the regularization parameter lambda in solving
> each least squares problem by the number of ratings the user generated
> in updating user factors, or the number of ratings the product
> received in updating product factors.
> ===
> I find this description confusing, probably because I lack a detailed
> understanding of ALS. The wording suggest that the number of ratings
> change ("generated", "received") during solving the least squares.
> This is how I think I should be interpreting the description:
> ===
> Since v1.1, we scale the regularization parameter lambda when solving
> each least squares problem. When updating the user factors, we scale
> the regularization parameter by the total number of ratings from the
> user. Similarly, when updating the product factors, we scale the
> regularization parameter by the total number of ratings for the
> product.
> ===
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[jira] [Commented] (SPARK-20072) Clarify ALS-WR documentation
[
https://issues.apache.org/jira/browse/SPARK-20072?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel=15938415#comment-15938415
]
Sean Owen commented on SPARK-20072:
---
I don't think those two wordings differ meaningfully? I think small suggestions
are OK but weight the value vs overhead of processing these changes. This is
pretty borderline.
> Clarify ALS-WR documentation
>
>
> Key: SPARK-20072
> URL: https://issues.apache.org/jira/browse/SPARK-20072
> Project: Spark
> Issue Type: Improvement
> Components: Documentation
>Affects Versions: 2.1.0
>Reporter: chris snow
>Priority: Trivial
>
> https://www.mail-archive.com/user@spark.apache.org/msg62590.html
> The documentation for collaborative filtering is as follows:
> ===
> Scaling of the regularization parameter
> Since v1.1, we scale the regularization parameter lambda in solving
> each least squares problem by the number of ratings the user generated
> in updating user factors, or the number of ratings the product
> received in updating product factors.
> ===
> I find this description confusing, probably because I lack a detailed
> understanding of ALS. The wording suggest that the number of ratings
> change ("generated", "received") during solving the least squares.
> This is how I think I should be interpreting the description:
> ===
> Since v1.1, we scale the regularization parameter lambda when solving
> each least squares problem. When updating the user factors, we scale
> the regularization parameter by the total number of ratings from the
> user. Similarly, when updating the product factors, we scale the
> regularization parameter by the total number of ratings for the
> product.
> ===
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