1500 search results for "Regression"

Ecological SEMs and Composite Variables: What, Why, and How

May 2, 2011
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Ecological SEMs and Composite Variables: What, Why, and How

I’m a HUGE fan of Structural Equation Modeling. Heck, I’ve even begun teaching short SEM workshops. (seriously, if you want, email me and we’ll talk). For those of you unfamiliar with the technique, it’s awesome for three main reasons. It’s a method of teasing apart direct and indirect interactions in your data. It allows you

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R/Finance conference in Chicago – April 29, 2011 to April 30, 2011

May 2, 2011
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This was my first year to attend the R/Finance conference that focuses on the use R programming in applied finance.  I was unable to get out there until mid-morning on Friday, so I missed Jeff Ryan’s tutorial on Automated Trading … Continue reading →

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Forming Formulas

April 29, 2011
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Forming Formulas

One of the first functions a new R user learns how to use is the lm() command, which involves stating the model formula.lm(y~x1+x2, data=mydata)After a while, this just becomes a natural way to say "I want a regression of y on x1 and x2 using mydata." ...

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Forming Formulas

April 29, 2011
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Forming Formulas

One of the first functions a new R user learns how to use is the lm() command, which involves stating the model formula.lm(y~x1+x2, data=mydata)After a while, this just becomes a natural way to say "I want a regression of y on x1 and x2 using mydata." ...

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New functions for linear model inference in Revolution R Enterprise 4.3

April 26, 2011
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The latest release of Revolution R Enterprise shows how Revolution Analytics’ package for big data, RevoScaleR, is continuing add new capabilities for Big Data statistics. RevoScaleR removes the limits on the size of the data that can be processed in R through the use of the highly efficient .Xdf binary file format. Xdf stores data by rows within columns...

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Kickstarter Data Analysis: Success and Pricing

April 25, 2011
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Kickstarter Data Analysis: Success and Pricing

Kickstarter is an online crowdfunding platform for launching creative projects. When starting a new project, project owners specify a deadline and the minimum amount of money they need to raise. They receive the money (less a transaction fee) only if … Continue reading →

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Annotated Manhattan plots and QQ plots for GWAS using R, Revisited

April 25, 2011
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Annotated Manhattan plots and QQ plots for GWAS using R, Revisited

Last year I showed you how to create manhattan plots, and later how to highlight regions of interest, using ggplot2 in R. The code was slow, required a lot of memory, and was difficult to maintain and modify.I finally found time to rewrite the code usi...

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R workshop in Hamilton, Ontario, May 24 and 25

April 25, 2011
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John Fox will be teaching a two-day introductory R workshop at McMaster University in Hamilton, Ontario, on May 24 and 25. The workshop will largely be based on materials from Fox and Weisberg, An R Companion to Applied Regression, Second Edition (Sage, 2011). Further information about the workshop is available at: https://www.socialsciences.mcmaster.ca/registrations/john-fox-introduction-to-r/fg_base_view_p3. A few spaces in the workshop are reserved for non-McMaster attendees and made...

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Measuring association using odds ratios

Measuring association using odds ratios

In my last two posts, I have used the UCI mushroom dataset to illustrate two things.  The first was the use of interestingness measures to characterize categorical variables, and the second was the use of binary confidence intervals...

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ComputerWorld on R for data analysis and visualization

April 20, 2011
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ComputerWorld's feature today, 22 free tools for data visualization and analysis, suggests open-source R as the third entry on the list: What it does: R is a general statistical analysis platform (the authors call it an "environment") that runs on the command line. Need to find means, medians, standard deviations, correlations? R can handle that and much more, including...

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