1745 search results for "Excel"

Analyzing Your Data on the AWS Cloud (with R)

July 22, 2013
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Analyzing Your Data on the AWS Cloud (with R)

Guest post by Jonathan Rosenblatt Disclaimer: This post is not intended to be a comprehensive review, but more of a “getting started guide”. If I did not mention an important tool or package I apologize, and invite readers to contribute in the comments. …Read more »

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Modeling Match Results in La Liga Using a Hierarchical Bayesian Poisson Model: Part one.

July 21, 2013
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Modeling Match Results in La Liga Using a Hierarchical Bayesian Poisson Model: Part one.

This is a slightly modified version of my submission to the UseR 2013 Data Analysis Contest which I had the fortune of winning :) The purpose of the contest was to do something interesting with a dataset consisting of the match results from the last five seasons of La Liga, the premium Spanish football (aka soccer) league. In...

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Advanced sab-R-metrics: Parallelization with the ‘mgcv’ Package

July 18, 2013
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Advanced sab-R-metrics: Parallelization with the ‘mgcv’ Package

Carson Sievert (creator of the really neat pitchRx package) and Steamer Projections posed a question about reasonable run times of the mgcv package on large data in R yesterday, and promised my Pitch F/X friends I would post here with a quick tip on sp...

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All My Roads Lead Back to Finance–PIMCO Sankey

July 17, 2013
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All My Roads Lead Back to Finance–PIMCO Sankey

Even though the route might be circuitous, my seemingly random journeys all seem to lead back to finance.  My fun with rCharts sankey diagrams (Exploring Networks with Sankey) has led me into an exploration of the PIMCO network.  Although PIMCO is best known for its fixed income products, PIMCO has broadened its product offerings...

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Evaluating the Potential Incorporation of R into Research Methods Education in Psychology

July 17, 2013
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I was recently completing some professional development activities that required me to write a report on a self-chosen topic related to diversity in student backgrounds. I chose to use the opportunity to reflect on the potential for using R to teach psychology students research methods. I thought I'd share the report in case it interests anyone. Abstract...

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Optimising a Noisy Objective Function

July 16, 2013
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Optimising a Noisy Objective Function

I am busy with a project where I need to calibrate the Heston Model to some Asian options data. The model has been implemented as a function which executes a Monte Carlo (MC) simulation. As a result, the objective function is rather noisy. There are a number of algorithms for dealing with this sort of problem, and

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Getting Started with Reproducible Research: A chapter from my new book

July 15, 2013
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Getting Started with Reproducible Research: A chapter from my new book

(This article was first published on Christopher Gandrud (간드루드 크리스토파), and kindly contributed to R-bloggers) This is an abridged excerpt from Chapter 2 of my new book Reproducible Research with R and RStudio. It’s published by Chapman & Hall/CRC Press. You can purchase it on Amazon. “Search inside this book” includes a complete table of contents. Researchers often start...

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Coming back from Albacete (useR conference 2013)…

July 15, 2013
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Dear MilanoR friends, I am just back from UseR 2013 in Albacete (Spain) and I would like to share. Thanks First of all I would like to thank all staff from the conference organizer committee and personnel for the excellent … Continue reading →

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Partial Least Squares Regression in R

July 14, 2013
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Partial Least Squares Regression in R

Partial Least Squares Regression:This week I will be doing some consulting around Structural Equation Modeling (SEM) techniques to solve a unique business problem.  We are trying to identify customer preference for various products and traditional regression is not adequate because of the high dimensional component to the data set along with the multi-colinearity of the variables.  PLS is a...

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R talks to Weka about Data Mining

July 14, 2013
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R talks to Weka about Data Mining

R provides us with excellent resources to mine data, and there are some good overviews out there: Yanchang’s website with Examples and a nice reference card The rattle-package that introduces a nice GUI for R, and Graham William’s compendium of tools The caret-package that offers a unified interface to running a multitude of model builders.

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