rnowling.github.io
RJ NowlingPersonal website and blog for RJ Nowling, Red Hat Software Engineer, part-time Ph.D. student in computational physics / bioinformatics.
http://rnowling.github.io/
Personal website and blog for RJ Nowling, Red Hat Software Engineer, part-time Ph.D. student in computational physics / bioinformatics.
http://rnowling.github.io/
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https://rnowling.github.io
Personal website and blog for RJ Nowling, Red Hat Software Engineer, part-time Ph.D. student in computational physics / bioinformatics.
rnowling.github.io
Feature Correlation and Feature Importance Bias with Random Forests
http://rnowling.github.io/machine/learning/2015/08/11/random-forest-correlation-bias.html
Feature Correlation and Feature Importance Bias with Random Forests. Aug 11, 2015. In my last post. I investigated claims by Altmann, et al. That feature importance scores from Random Forests (RFs) were biased for categorical variables. I demonstrated that the bias was due to the encoding scheme. I also validated the third experiment of the paper by Altmann, et al. The same pattern emerges as the number of correlated variables increases, the feature importance score for each variable decreases. This ...
Configuring a Multi-User Spark Cluster with Mesos and Gluster
http://rnowling.github.io/spark/2015/04/07/multiuser-spark-mesos.html
Configuring a Multi-User Spark Cluster with Mesos and Gluster. Apr 7, 2015. My team at Red Hat is a big proponent of Apache Spark. For data processing and analysis work. I haven’t seen much information on how Spark is deployed and configured in production. To help fill that void, I’m sharing some information how we deployed and configured our cluster. Our cluster is relatively small ( 10 nodes) but our machines are beefy, each with 40 cores, 396GB of RAM, and 12 hard drives in RAID 1 arrays. As we get fe...
Electrostatic Cutoffs in Molecular Dynamics
http://rnowling.github.io/math/2015/06/24/electrostatic-cutoffs.html
Electrostatic Cutoffs in Molecular Dynamics. Jun 24, 2015. Classical potentials commonly used in molecular dynamics contain Lennard-Jones. In the rawest form, the electrostatic potential required calculations per evaluation. Particle Mesh Ewald. Can we be used to reduce the complexity to but is complicated to implement. Cutoffs are a simpler approach. At distances of about 1 nm and greater, the electrostatic forces are small enough to ignore without significant effects on accuracy.
BigPetStore Product Purchasing Multinomial Model
http://rnowling.github.io/math/2015/07/07/bps-product-multinomial.html
BigPetStore Product Purchasing Multinomial Model. Jul 7, 2015. In my last post. As a reminder, my goals for the dynamics are as follows:. Customers have clear preferences for certain field values (such as potatoes or soy ) over other values ( corn ). Customers tend to buy the same product repeatedly, rotate between a few preferred products, or just pick products randomly. Patterns should be clearly distinguishable (e.g., customers can be segmented relatively easily). Chicken', 'soy'): 171 ('beef', 'potat...
Categorical Variable Encoding and Feature Importance Bias with Random Forests
http://rnowling.github.io/machine/learning/2015/08/10/random-forest-bias.html
Categorical Variable Encoding and Feature Importance Bias with Random Forests. Aug 10, 2015. Are a popular and powerful ensemble classification method. One of RFs nice features is their ability to calculate the importance of features for separating classes. Among other applications, RFs’ feature importance scores have been used to identify SNPs associated with higher risk of diseases. Strobl, et al. And Altmann, et al. I was surprised to find no evidence of bias! It occurred to me that the authors probab...
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tool monkey
http://erikerlandson.github.io/blog/page/2
Adventures of an unfrozen caveman programmer. The ‘prepare’ operation considered harmful in Algebird aggregation. I want to make an argument that the Algebird Aggregator. Design, in particular its use of the. Operation in a map-reduce context, has substantial inefficiencies, compared to an equivalent formulation that is more directly suited to taking advantage of Scala’s aggregate method on collections. Consider the definition of aggregation in the Aggregator class:. Operation. In other words,. We are in...
Faster Random Samples With Gap Sampling - tool monkey
http://erikerlandson.github.io/blog/2014/09/11/faster-random-samples-with-gap-sampling
Adventures of an unfrozen caveman programmer. Faster Random Samples With Gap Sampling. Update (April 4, 2016): my colleague RJ Nowling. Ran across a paper by J.S. Vitter. That shows Vitter developed the trick of accelerating sampling with a sampling-gap distribution in 1987 – I re-invented Vitter’s wheel 30 years after the fact! I’m surprised it never caught on, as it is not much harder to implement than the naive version. It is random access. Its size is known. It can be destructively modified. Sample(d...
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Rafał Nowak
Thursday, June 5, 2014. Spring Boot and AngularJS quick start. In this post I am going to show very simple and quick example of web application using Spring. This app contains simple functionality of sending and storing imaginary messages. I've also used gradle. For build management. All code is public and it is available on my github: https:/ github.com/rafalnowak/spring-boot-fun. Introduction to Spring Boot. Most important and prominent goals of this projects are:. Simple Spring Boot web application.
RNO - Registro de Osteópatas Profesionales
ROP - Calle de la Reina nº6, 1B - 46011 Valencia. Tel. 96 111 31 41 / Mov. 692 10 63 10 / Fax. 96 381 87 78 - info@rnoweb.com. Tweets por @ROP Valencia. Aquí podrás descargarte documentos y artículos de interés. CUESTIONARIO DE ADHESIÓN MEDICINA ALTERNATIVA. SEGURO DE DEFENSA JURÍDICA. Información sobre la titulacion del RCU. Primer estudio profesional sobre Uso y Hábitos de Consumo de la TN en España. Acta de suspensión del decreto de regulación. Respuesta al colegio de Fisioterapeutas del País Vasco.
Studio 210-Nowell's World - Suumer Art Camp 2013
Suumer Art Camp 2013. Class Supply Page 2011-2012. 2010 Druid City High School Art Show. Puppet Contest Spring 2010. Summer Art Camp 2013. July 15-19 or July 22-26. 9:30 am- 12:30 pm. E-mail addresses for contact with adult-. Medical concerns if any-. Attn: Summer Art Camp. Tuscaloosa, AL 35406. Create a free website. Start your own free website. A surprisingly easy drag and drop site creator. Learn more.
rob nowik's blog | Just another WordPress site
Rob nowik's blog. Just another WordPress site. Quicknote: Binding XAML event to ViewModel. Windows 8: “Run as Different User”. Quicknote: Reduce size of Hyberfile.sys. Note to self / reminder here’s a nice article on getting started with BDD. Http:/ msdn.microsoft.com/en-us/magazine/gg490346.aspx. June 17, 2014. January 2, 2015. Quicknote: Binding XAML event to ViewModel. I then added a namespace reference as follows: xmlns:i=” http:/ schemas.microsoft.com/expression/2010/interactivity. May 30, 2013.
Crazy Cat Lady in Waiting | Just another WordPress.com weblog
Crazy Cat Lady in Waiting. Just another WordPress.com weblog. 2011 in review (as summarized by WordPress.com). January 6, 2012. My first year of blogging, beautifully summarized by the good people at WordPress.com. Turns out I have “fans” in South Africa and Indonesia. Who knew. Thanks to everyone who read my posts. I’ll try to be better about sticking with the post a week this year. The WordPress.com stats helper monkeys prepared a 2011 annual report for this blog. Here’s an excerpt:. Post a week 2011.
RJ Nowling
Aug 11, 2015. Feature Correlation and Feature Importance Bias with Random Forests. Aug 10, 2015. Categorical Variable Encoding and Feature Importance Bias with Random Forests. Jul 21, 2015. Clatern: An Up-and-Coming ML Library for Clojure. Jul 11, 2015. Customer Segmentation with the BigPetStore Multinomial Model. Jul 9, 2015. Jul 7, 2015. BigPetStore Product Purchasing Multinomial Model. Jul 6, 2015. BigPetStore Product Purchasing Markov Model. Jul 1, 2015. Jun 24, 2015. Jun 19, 2015. Jun 17, 2015.
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