Monthly Archives: January 2017

BiclustGUI 1.1.0

January 26, 2017
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BiclustGUI 1.1.0

BiBitR enters the fray! Ewoud De Troyer, University of Hasselt (CenStat) Introduction The latest patch of the BiclustGUI includes the implementation of BiBitR, a simple R wrapper which directly calls the original Java code for applying the BiBit algo...

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Kung Fu R

January 26, 2017
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Kung Fu R

A great way to hone your skills as a data scientist is to pick a topic you're passionate about, find some data related to it, and analyze the heck out of it. Jim Vallandingham is clearly passionate about old Kung Fu movies — particularly those from the Shaw Brothers Studio — and has used R to analyze data the...

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Image Compression with Principal Component Analysis

January 26, 2017
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Image Compression with Principal Component Analysis

Image compression with principal component analysis is a frequently occurring application of the dimension reduction technique. Recall from a previous post that employed singular value decomposition to compress an image, that an image is a matrix of pixels represented by RGB color values. Thus, principal component analysis can be used... The post Image Compression with Principal Component Analysis appeared first...

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New Zealand bank replaces SAS server with R Server

January 26, 2017
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Heartland Bank, a rapidly growing bank in New Zealand, has adopted a data-driven approach to analyzing risk, evaluating credit lines, and understanding cash flows. But they found their legacy SAS system to be labor-intensive and time consuming when it came to updating financial models, and it was expensive to boot. (Being licensed on a per-user basis, it was available...

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Multiple Regression (Part 2) – Diagnostics

January 26, 2017
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Multiple Regression (Part 2) – Diagnostics

Multiple Regression is one of the most widely used methods in statistical modelling. However, despite its many benefits, it is oftentimes used without checking the underlying assumptions. This can lead to results which can be misleading or even completely wrong. Therefore, applying diagnostics to detect any strong violations of the assumptions is important. In the

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Using CPLEX in R: Installing cplexAPI in Windows 10

January 26, 2017
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Using CPLEX in R: Installing cplexAPI in Windows 10

I have a very large mixed integer problem to solve.   COIN‘s solver accessed through Rsymphony did a decent job, but had trouble finding feasible solutions.  I had been told that the IBM cplex  solver was the best on the market for mixed integer programming. Installing cplex is a relatively easy task.  The difficulties began when I … Continue reading Using...

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Upcoming Win-Vector LLC public speaking engagements

January 26, 2017
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I am happy to announce a couple of exciting upcoming Win-Vector LLC public speaking engagements. BARUG Meetup Tuesday, Tuesday February 7, 2017 ~7:50pm, Intuit, Building 20, 2600 Marine Way, Mountain View, CA. Win-Vector LLC’s John Mount will be giving a “lightning talk” (15 minutes) on R calling conventions (standard versus non-standard) and showing how to … Continue reading Upcoming...

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Upgrading to macOS Sierra (nee OSX) for R users

January 26, 2017
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Upgrading to macOS Sierra (nee OSX) for R users

A good fraction of R users use Apple computers. Apple machines historically have sat at a sweet spot of convenience, power, and utility: Convenience: Apple machines are available at retail stores, come with purchasable support, and can run a lot of common commercial software. Power: R packages such as parallel and Rcpp work better on … Continue reading Upgrading...

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Predicting the Willingen 2017 men’s ski jumping competition

January 26, 2017
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Predicting the Willingen 2017 men’s ski jumping competition

In an earlier post of mine, I carried out an analysis on ski jumping data for Zakopane, Poland and attempted to predict which athletes would end up on the podium. I also created a classification tree and tested it on the 2017 competition data with good results. For this side project of mine, I hope… Continue reading Predicting the...

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One View of the Impact of the New Immigration Ban (+ freeing PDF data with tabulizer)

January 26, 2017
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One View of the Impact of the New Immigration Ban (+ freeing PDF data with tabulizer)

Dear Leader has made good on his campaign promise to “crack down” on immigration from “dangerous” countries. I wanted to both see one side of the impact of that decree — how many potential immigrants per year might this be impacting — and show toss up some code that shows how to free data from... Continue reading →

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