2244 search results for "MAP"

PCA or Polluting your Clever Analysis

August 31, 2012
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PCA or Polluting your Clever Analysis

When I learned about principal component analysis (PCA), I thought it would be really useful in big data analysis, but that's not true if you want to do prediction. I tried PCA in my first competition at kaggle, but it delivered bad results. This post illustrates how PCA can pollute good predictors.When I started examining this problem,...

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Follow-Up: Making a Word Cloud for a Search Result from GScholar_Scraper_3.1

August 30, 2012
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Follow-Up: Making a Word Cloud for a Search Result from GScholar_Scraper_3.1

Here's a short follow-up on how to produce a word cloud for a search result from GScholarScraper_3.1:# File-Name: GScholarScraper_3.1.R# Date: 2012-08-22# Author: Kay Cichini# Email: [email protected]# Purpose: Scrape Google Scholar search result# ...

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Three ways of visualizing the growth of Walmart

August 30, 2012
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Three ways of visualizing the growth of Walmart

It's a wonderful thing when people make interesting data sets available to the public. When Thomas Jones wrote a paper in Econometrics about the growth of US retail giant Walmart, he made the data he collected about every Walmart store opening in history (location and date) available to the public. Since then, several people have used different techniques to...

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Visually weighted regression in R (à la Solomon Hsiang)

August 30, 2012
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Visually weighted regression in R (à la Solomon Hsiang)

, and also the discussions on the Statistical Modeling, Causal

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Virginia: Comparison of Registered Voter Counts to Census Voting Age Population

August 29, 2012
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Virginia: Comparison of Registered Voter Counts to Census Voting Age Population

By Earl F Glynn | Franklin Center A comparison of US Census voting age population data in Virginia to voter registration data shows only one locality, Surry County, with about 100% of the voting age population registered to vote. Six other localities have about 95% of their voting age population registered:  Craig County, Isle of

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Plotting model fits

August 29, 2012
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Plotting model fits

We all know that it is important to plot your data and explore the data visually to make sure you understand it. The same is true for your model fits. First, you want to make sure that the model is fitting...

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Setting Up the Development Version of R

August 28, 2012
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My coworkers at Fred Hutchinson regularly use the development version of R (i.e., R-devel) and have urged me to do the same. This post details how I have set up the development version of R on our Linux server, which I use remotely because it is much faster than my Mac. First, I downloaded the R-devel source into ~/local/, which...

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Arctic sea-ice at lowest levels since observations began

August 28, 2012
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Arctic sea-ice at lowest levels since observations began

RealClimate.org used the R language and data from the National Snow and Ice Data Center to create this chart showing the extent of Arctic sea-ice in each year since satellite observations began in 1978, and the current extent of ice coverage (in red). Even though there are several weeks of annual melting yet to come, the area of ice...

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Are career motivations changing?

August 28, 2012
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Are career motivations changing?

The German news magazine Der Spiegel published a series of articles around career developments. The stories suggest that career aspirations of young professionals today are somewhat different to those of previous generations in Germany. Apparen...

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Kaggle Prospect – Harvard Business Review

August 25, 2012
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This post is meant for submitting visual analysis for the Harvard Business Review Contest on KaggleI used the subject lines for all the articles and all the years and mapped the articles into one of the following 18 categories  Business Ethics  Business Management  Crisis  Emerging Markets  Financial Performance  Health Care  Information Technology  Labor  Leadership  Management Systems  Marketing Strategy  Regulation  Social Media  Stock Market  Strategic Planning  Supply Chain  United States & World  Women & Management Changes in...

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