1700 search results for "tutorial"

Baseball: Probability of winning conditional on runs, hits, walks and errors

September 2, 2014
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Baseball: Probability of winning conditional on runs, hits, walks and errors

If a team scores X runs, what's the probability it will win the game? The post Baseball: Probability of winning conditional on runs, hits, walks and errors appeared first on Decision Science News.

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Yet another R package primer

August 28, 2014
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Yet another R package primer

Hadley Wickham is writing what will surely be a great book about the basics of R packages. And Hilary Parker wrote a very influential post on how to write an R package. So it seems like that topic is well covered. Nevertheless, I’d been thinking for some time that I should write another minimal tutorial

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TTTAR2: My First Shiny App with Bootstrap – #RUGSMAPS

August 26, 2014
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TTTAR2: My First Shiny App with Bootstrap – #RUGSMAPS

Thing To Try After useR! part 2 (TTTAR2) Originally, this post was supposed to be a sequel to TTTAR1 about h2o machine learning. Since TTTAR1 I have been carrying out more h2o tests both locally and on the cloud with the very kind support of Nick Elprin from Domino. The more...

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Making Your Code Citable

August 26, 2014
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Making Your Code Citable

Original post from GitHub Guides:Digital Object Identifiers (DOI) are the backbone of the academic reference and metrics system. If you’re a researcher writing software, this guide will show you how to make the work you share on GitHub citable by archiving one of your GitHub repositories and assigning a DOI with the data...

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The Chi-Squared Test of Independence – An Example in Both R and SAS

The Chi-Squared Test of Independence – An Example in Both R and SAS

Introduction The chi-squared test of independence is one of the most basic and common hypothesis tests in the statistical analysis of categorical data.  Given 2 categorical random variables, and , the chi-squared test of independence determines whether or not there exists a statistical dependence between them.  Formally, it is a hypothesis test with the following null and

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Continuous or Discrete Latent Structure? Correspondence Analysis vs. Nonnegative Matrix Factorization

August 25, 2014
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Continuous or Discrete Latent Structure? Correspondence Analysis vs. Nonnegative Matrix Factorization

A map gives us the big picture, which is why mapping has become so important in marketing research. What is the perceptual structure underlying the European automotive market? All we need is a contingency table with cars as the rows, attributes as the ...

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Do your "data janitor work" like a boss with dplyr

August 20, 2014
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Do your "data janitor work" like a boss with dplyr

Data “janitor-work” The New York Times recently ran a piece on wrangling and cleaning data: “For Big-Data Scientists, ‘Janitor Work’ Is Key Hurdle to Insights” Whether you call it “janitor-work,” wrangling/munging, cleaning/cleansing/scrubbing, tidying, or something else, the article above is worth a read (even though it implicitly denigrates the important work that your housekeeping staff does). It’s...

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GBMs are awesome: Part I

August 19, 2014
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GBMs have become my favorite type of model over the last two years. In this tutorial, I demonstrate how to use a GBM for binary classification in R (predicting whether an event occurs or not). I also discuss basic model tuning and model inference with ...

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analyze the programme for the international assessment of adult competencies (piaac) with r

August 19, 2014
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heaven knows we've all been there: you're in a heated argument with some patriotic zealot who thinks (insert country here) has the best labor force on earth.  you know they're just spewing made-up-statistic after made-up-statistic, but you don't h...

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21 R navigation tools

August 17, 2014
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21 R navigation tools

Navigation gets you from where you are to where you want to be. Speaking of navigation, you can jump to selected sections of this post: Navigation; R-bloggers; Task views; Rdocumentation.org; sos package; ??; apropos; ls; methods; getAnywhere; :::; find; args; grep; %in%; str; getwd; file.choose; Spyglass summary; browser; See also. Overview Figure 1: A map The post

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