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Surprise and Coincidence - musings from the long tail

Surprise and Coincidence - musings from the long tail. Wednesday, September 18, 2013. How Accurate is Mahout for Summing Numbers? A question was recently posted on the Mahout mailing list suggesting that the Mahout math library was "unwashed" because it didn't use Kahan summation. My feeling is that this complaint is not founded and Mahout is considerably more washed than the original poster suggests. Here is why I think this. There are several cases to consider:. 2) dot product and friends. In the secon...

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Surprise and Coincidence - musings from the long tail | tdunning.blogspot.com Reviews
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Surprise and Coincidence - musings from the long tail. Wednesday, September 18, 2013. How Accurate is Mahout for Summing Numbers? A question was recently posted on the Mahout mailing list suggesting that the Mahout math library was unwashed because it didn't use Kahan summation. My feeling is that this complaint is not founded and Mahout is considerably more washed than the original poster suggests. Here is why I think this. There are several cases to consider:. 2) dot product and friends. In the secon...
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Surprise and Coincidence - musings from the long tail | tdunning.blogspot.com Reviews

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Surprise and Coincidence - musings from the long tail. Wednesday, September 18, 2013. How Accurate is Mahout for Summing Numbers? A question was recently posted on the Mahout mailing list suggesting that the Mahout math library was "unwashed" because it didn't use Kahan summation. My feeling is that this complaint is not founded and Mahout is considerably more washed than the original poster suggests. Here is why I think this. There are several cases to consider:. 2) dot product and friends. In the secon...

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Surprise and Coincidence - musings from the long tail: How Accurate is Mahout for Summing Numbers?

http://tdunning.blogspot.com/2013/09/how-accurate-is-mahout-for-summing.html

Surprise and Coincidence - musings from the long tail. Wednesday, September 18, 2013. How Accurate is Mahout for Summing Numbers? A question was recently posted on the Mahout mailing list suggesting that the Mahout math library was "unwashed" because it didn't use Kahan summation. My feeling is that this complaint is not founded and Mahout is considerably more washed than the original poster suggests. Here is why I think this. There are several cases to consider:. 2) dot product and friends. In the secon...

2

Surprise and Coincidence - musings from the long tail: July 2010

http://tdunning.blogspot.com/2010_07_01_archive.html

Surprise and Coincidence - musings from the long tail. Friday, July 30, 2010. A few years ago, I built a prototype system I called grool in Groovy to simplify map-reduce programming. My goal was to use Groovy to handle control flow and define operations but to execute large programs using Hadoop. Flume also provide an optimizer which is made possible because Flume uses lazy evaluation. This makes FlumeJava programs nearly as efficient as well-optimized hand-written programs. Other systems like Pi...Ted D...

3

Surprise and Coincidence - musings from the long tail: February 2012

http://tdunning.blogspot.com/2012_02_01_archive.html

Surprise and Coincidence - musings from the long tail. Wednesday, February 8, 2012. The basic idea with Bayesian Bandits is to solve the problem of the explore/exploit trade-off in a multi-armed bandit by keeping a distributional estimates for the probability of payoff for each bandit, but avoiding the cost of manipulating distributions by sampling from those distributions and then proceeding on each iteration as if that were a point estimate. Our internal representation encodes all of the information th...

4

Surprise and Coincidence - musings from the long tail: Learning to Rank, in a Very Bayesian Way

http://tdunning.blogspot.com/2013/04/learning-to-rank-in-very-bayesian-way.html

Surprise and Coincidence - musings from the long tail. Wednesday, April 24, 2013. Learning to Rank, in a Very Bayesian Way. The problem of ranking comments by a crowd-sourced version of "quality" is a common one on the internet. That Bayesian Bandit algorithms can be applied to this problem. The basic idea is that you would define a stochastic quality metric whose distribution for each comment depends on the up and down votes that comment has received. Java -jar target/bandit-ranking-*-with-dependencies&...

5

Surprise and Coincidence - musings from the long tail: May 2011

http://tdunning.blogspot.com/2011_05_01_archive.html

Surprise and Coincidence - musings from the long tail. Sunday, May 29, 2011. Online algorithms for boxcar-ish moving averages. One problem with exponentially weighted moving averages is that the weight that older samples decays sharply even for very recent samples. The Canny filter puts higher weight on the events in the recent past which makes it preferable when you don't want to forget things right away, but do want to forget them before long and also want an on-line algorithm. It is nice to set the ma...

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Tube of Terror post-mortem | Ken's Techno Tidbits

https://ken-blog.krugler.org/2012/10/04/tube-of-terror-post-mortem

Ken's Techno Tidbits. Tube of Terror post-mortem. So in the end, we didn’t win. We did avoid hitting other vehicles, or crashing into a hay bale, or crashing into somebody (like a race volunteer), unlike a few other vehicles I could mention. And we looked good…. Turns out my near-death power slide on Nimrod during a test run caused the rear axle frame to bend, leading to toe-out (or toe-in? I can never remember). You can follow any responses to this entry through the RSS 2.0. Feed You can leave a response.

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Kaweah Basin | Ken's Techno Tidbits

https://ken-blog.krugler.org/tag/kaweah-basin

Ken's Techno Tidbits. Kaweah Basin Hike 2015. July 20, 2015. To make things more interesting, we decided to do it as a trans-Sierra trip, crossing through remote Kaweah Basin and meeting up with friends in the Big Arroyo, before exiting via Mineral King. Since it’s a one-way, issue #1 was how to get there. I originally made plans to use the Eastern Sierra Transit. Speaking of the shuttle, we used Paul Fretheim of East Side Sierra Shuttle. The above photo is from the hiker’s trailhead, which is a bi...

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March | 2012 | Ken's Techno Tidbits

https://ken-blog.krugler.org/2012/03

Ken's Techno Tidbits. The Tube of Terror. March 27, 2012. June 16th is the second annual Nevada City Adult Soapbox Derby. Where grown men (and some women) raise money for Pioneer Park, by spending ridiculous amounts of time building gravity-powered vehicles. Here’s the local hospital entry from last year:. This year, since I’ve got so much free time, I decided to put together a team. Thus was born the “Tube of Terror”, sponsored by Scale Unlimited. You are currently browsing the Ken's Techno Tidbits.

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Kaweah Basin Hike 2015 | Ken's Techno Tidbits

https://ken-blog.krugler.org/2015/07/20/kaweah-basin-hike-2015

Ken's Techno Tidbits. Kaweah Basin Hike 2015. To make things more interesting, we decided to do it as a trans-Sierra trip, crossing through remote Kaweah Basin and meeting up with friends in the Big Arroyo, before exiting via Mineral King. Since it’s a one-way, issue #1 was how to get there. I originally made plans to use the Eastern Sierra Transit. Speaking of the shuttle, we used Paul Fretheim of East Side Sierra Shuttle. The above photo is from the hiker’s trailhead, which is a bit upstream from...

ken-blog.krugler.org ken-blog.krugler.org

Tube of Terror Test Run | Ken's Techno Tidbits

https://ken-blog.krugler.org/2012/05/27/tube-of-terror-test-run-2

Ken's Techno Tidbits. Tube of Terror Test Run. Time to see if the steering adjustments are working…. 8230;and the brakes too🙂. Http:/ www.facebook.com/v/10150837707449007. This entry was posted on Sunday, May 27th, 2012 at 4:15 pm and is filed under Soapbox Derby. You can follow any responses to this entry through the RSS 2.0. Feed You can leave a response. From your own site. Laquo; Previous Post. Next Post ». Tube of Terror Test Run. June 12, 2012 at 2:40 pm. Leave a Reply Cancel reply.

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Jeff on Cloud Computing: April 2008

http://jeffeastman.blogspot.com/2008_04_01_archive.html

Jeff on Cloud Computing. Thursday, April 17, 2008. I Encounter Scary Math. My first programming experiences on the Mahout. Project were pretty straightforward. I was working on a problem that seemed to need some clustering - grouping data that is "similar". I listened to a couple of excellent Google Tutorials that explained how to use Map/Reduce to implement Canopy Clustering. Then, Ted Dunning. An active contributor to the Hadoop and Mahout mailing lists, introduced me to Dirichlet Process Clustering.

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Shepherd Pass | Ken's Techno Tidbits

https://ken-blog.krugler.org/tag/shepherd-pass

Ken's Techno Tidbits. Kaweah Basin Hike 2015. July 20, 2015. To make things more interesting, we decided to do it as a trans-Sierra trip, crossing through remote Kaweah Basin and meeting up with friends in the Big Arroyo, before exiting via Mineral King. Since it’s a one-way, issue #1 was how to get there. I originally made plans to use the Eastern Sierra Transit. Speaking of the shuttle, we used Paul Fretheim of East Side Sierra Shuttle. The above photo is from the hiker’s trailhead, which is a bi...

ken-blog.krugler.org ken-blog.krugler.org

July | 2015 | Ken's Techno Tidbits

https://ken-blog.krugler.org/2015/07

Ken's Techno Tidbits. Kaweah Basin Hike 2015. July 20, 2015. To make things more interesting, we decided to do it as a trans-Sierra trip, crossing through remote Kaweah Basin and meeting up with friends in the Big Arroyo, before exiting via Mineral King. Since it’s a one-way, issue #1 was how to get there. I originally made plans to use the Eastern Sierra Transit. Speaking of the shuttle, we used Paul Fretheim of East Side Sierra Shuttle. The above photo is from the hiker’s trailhead, which is a bi...

ken-blog.krugler.org ken-blog.krugler.org

Ken's Techno Tidbits | Page 2

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Ken's Techno Tidbits. How a Programmer Works on a Soapbox Derby Racer. April 27, 2012. Once I knew I had a winning ticket for the race, I did what any programmer would do when getting started. No, I didn’t make the t-shirt. I wrote a simulation. Step #1 was to get the profile of the race course. Google Earth has nice support for generating a profile from a path:. And then I could turn these equations into code:. Finally, I could generate results with different weights, and graph them. April 25, 2012.

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April | 2014 | Ken's Techno Tidbits

https://ken-blog.krugler.org/2014/04

Ken's Techno Tidbits. Sufferfest at the Banff Mountain Film Festival. April 6, 2014. Every year we travel to Downieville. To watch the Banff Mountain Film Festival. Movies as part of their annual tour. Downieville might be their smallest stop in the world, with a theater that seats about 200 good friends. It’s an hour drive on windy roads from where I live in Nevada City, but once we’re there it’s always a fun party, including the annual intermission frisbee-fest. In 1988 Robin Ingraham was climbing with...

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Surprise and Coincidence - musings from the long tail

Surprise and Coincidence - musings from the long tail. Wednesday, September 18, 2013. How Accurate is Mahout for Summing Numbers? A question was recently posted on the Mahout mailing list suggesting that the Mahout math library was "unwashed" because it didn't use Kahan summation. My feeling is that this complaint is not founded and Mahout is considerably more washed than the original poster suggests. Here is why I think this. There are several cases to consider:. 2) dot product and friends. In the secon...

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