4028 search results for "git"

Presidential Debates 2012

October 23, 2012
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Presidential Debates 2012

I have been playing with the beta version of qdap utilizing the presidential debates as a data set. qdap is in a beta phase lacking documentation though I’m getting there. In previous blog posts (presidential debate 1 LINK and VP … Continue reading →

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googleVis 0.3.0/0.3.1 is released: It’s faster!

October 23, 2012
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googleVis 0.3.0/0.3.1 is released: It’s faster!

Version 0.3.0 of the googleVis package for R has been released on CRAN on 20 October 2012. With this version we have been able to speed up the code considerably. The transformation of R data frames into JSON works significantly faster. The execution of the gvisMotionChart function in the World Bank demo is over 35 times...

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Eight new R User Groups worldwide

October 22, 2012
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There are new local R user groups in eight (!) countries to announce this month: Sweden is host to the first R user group in Scandinavia. StockholmR has been holding meetings since September, and their next meeting on November 28 will be on Teaching R and Data visualization using R. In Taiwan, the Taipei-based Taiwan useR Group holds regular...

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Is it meaningful to talk about a probability of “65.7%” that Obama will win the election?

October 22, 2012
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Is it meaningful to talk about a probability of “65.7%” that Obama will win the election?

The other day we had a fun little discussion in the comments section of the sister blog about the appropriateness of stating forecast probabilities to the nearest tenth of a percentage point. It started when Josh Tucker posted this graph from Nate Silver: My first reaction was: this looks pretty but it’s hyper-precise. I’m a The post Is...

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Distribution of colors by flag

October 22, 2012
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Distribution of colors by flag

A story: We showed you how to use R to assess flag similarity and make a scatter plot of raster images. Dr. Wickham referred us to the set of 2400 flag icons made available by GoSquared, and then (probably jokingly) challenged us to replicate the cool...

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Predict User’s Return Visit within a day part-2

October 22, 2012
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Predict User’s Return Visit within a day part-2

Welcome to the second part of the series on predicting user’s revisit to the website. In my earlier blog Logistic Regression with R, I discussed what is logistic regression. In the first part of the series, we applied logistic regression to available data set. The problem statement there was whether a user will return in

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Predict User’s Return Visit within a day part-1

October 22, 2012
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Predict User’s Return Visit within a day part-1

In my earlier blog, I have discussed about what is logistic regression? And how logistic model is generated in R? Now we will apply that learning on a specific problem of prediction. In this post, I will create a basic model to predict whether a user will return on website in next 24 hours. This

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Classes and Objects in R

October 21, 2012
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Classes and objects in R Welcome back! In this blog post I'm going to try to tackle the concept of objects in R. R is said to be an “object oriented” language. I touched on this in my last post when we discussed the concatenate function c() and I'll go a bit beyond that this time. Speaking of the c() function, I'll begin this...

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Logistic Regression with R

October 21, 2012
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Logistic Regression with R

Logistic Regression In my first blog post, I have explained about the what is regression? And how linear regression model is generated in R? In this post, I will explain what is logistic regression? And how the logistic regression model is generated in R? Let’s first understand logistic regression. Logistic regression is one of the

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Basics of JavaScript and D3 for R Users

October 21, 2012
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Basics of JavaScript and D3 for R Users

Hadley Wickham, creator of the ggplot2 R package, has been learning JavaScript and its D3 library for the next iteration of ggplot2 (tentatively titled r2d3?)… so I suspect it’s only a matter of time before he pulls the rest of the … Continue reading →

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