335 search results for "evaluation"

analyze the national immunization survey (nis) with r

January 6, 2014
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for twenty years now, the centers for disease control and prevention (cdc) has been random-digit-dialing american households to ask parents which vaccinations their little tykes have received.  and since vaccination history might not be at the for...

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New version of pqR, now with task merging

January 1, 2014
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New version of pqR, now with task merging

 I’ve now released pqR-2013-12-29, a new version of my speedier implementation of R.  There’s a new website, pqR-project.org, as well, and a new logo, seen here. The big improvement in this version is that vector operations are sped up using task merging. With task merging, several arithmetic operations on a vector may be merged into a

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Understanding the data analytics project life cycle

December 12, 2013
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Understanding the data analytics project life cycle

While dealing with the data analytics projects, there are some fixed tasks that should be followed to get the expected output. So here we are going to build a data analytics project cycle, which will be a set of standard data-driven processes to lead data to insights effectively. The defined data analytics processes of a The post Understanding...

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Down-Sampling Using Random Forests

December 8, 2013
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Down-Sampling Using Random Forests

We discuss dealing with large class imbalances in Chapter 16. One approach is to sample the training set to coerce a more balanced class distribution. We discuss down-sampling: sample the majority class to make their frequencies closer to the rarest class. up-sampling: the minority class is resampled to increase the corresponding frequencies hybrid approaches: some methodologies do a little of both and...

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R / Bioconductor for High-Throughput Sequence Analysis

December 6, 2013
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I would like to recommend a recent workshop material on R/Bioconductor from Marc Carlson et al.http://www.bioconductor.org/help/course-materials/2013/SeattleMay2013/PDF: IntermediateSequenceAnalysis2013.pdfR script: IntermediateSequenceAnalysis201...

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New Version of RStudio (v0.98)

December 3, 2013
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New Version of RStudio (v0.98)

We’re pleased to announce that the final version of RStudio v0.98 is available for download now. Highlights of the new release include: An interactive debugger for R that is tightly integrated with base R debugging tools (browser, recover, etc.) Numerous improvements to the Workspace pane (which is now called the Environment pane). R Presentations for easy authoring

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Newest release of BCEA

December 2, 2013
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Very shortly, I'll upload the newest release of BCEA, my R package to post-process the output of a (Bayesian) health economic model and produce systematic summaries (such as graphs and tables) for a full economic evaluation and probabilistic sensitivit...

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Unusual timing shows how random mass murder can be (or even less)

November 29, 2013
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Unusual timing shows how random mass murder can be (or even less)

This post follows the original one on the headline of the USA Today I read during my flight to Toronto last month. I remind you that the unusual pattern was about observing four U.S. mass murders happening within four days, “for the first time in at least seven years”. Which means that the difference between

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Importance sampling schemes for evidence approximation in mixture models

November 26, 2013
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Importance sampling schemes for evidence approximation in mixture models

Jeong Eun (Kate) Lee and I completed this paper, “Importance sampling schemes for evidence approximation in mixture models“, now posted on arXiv. (With the customary one-day lag for posting, making me bemoan the days of yore when arXiv would give a definitive arXiv number at the time of submission.) Kate came twice to Paris in the past

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Generating Ticker Symbols with Markov Chains

November 25, 2013
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Generating Ticker Symbols with Markov Chains

Stock ticker symbols are short character string codes (AAPL for Apple, WMT for Walmart) that uniquely identify stock listings. They originate from the days when stock quotes were transmitted via telegraph. These symbols are often used as tools for branding and companies choose them to be memorable and easily recognized. As a fun and simple...

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