Blog Archives

Threading in R?

December 11, 2016
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Threading in R?

I was pleased to see today’s post, “(A Very) Experimental Threading in R,” by Lukasz Bartnik, as this is a long-standing interest of mine. My own effort in this direction has been my package Rdsm. The notion of threading, for those who may not have this background, refers to several instances of a program, in this … Continue...

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Using CART: Implementation Matters

December 11, 2016
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Using CART: Implementation Matters

In preparing the following example for my forthcoming book, I was startled by how different two implementations of Classification and Regression Trees (CART) performed on a particular data set. Here is what happened: For my example, I first used the Vertebral Column data set from the UCI Machine Learning Repository. The task is to classify patients … Continue...

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My regtools Package Is Now on CRAN

November 7, 2016
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My regtools Package Is Now on CRAN

In my posts to this blog (less frequent than I would like, hopefully more frequent in the future), I’ve often mentioned my R package regtools, which contains a number of functions useful for regression and classification. None of them duplicate what is available in the excellent packages on CRAN, so I will dare characterize regtools … Continue...

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Manny Parzen Used R!

August 20, 2016
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Manny Parzen Used R!

Prof. Manny Parzen, a pioneer of modern statistics, passed away in February, aged 87. I should have commented back then, but it’s still worth saying something today. I happened to be thinking of him this morning. I did not know Manny personally. This makes it odd that I refer to him by his first name, … Continue...

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StatET IDE for R

July 22, 2016
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StatET IDE for R

I personally do not use Integrated Development environments (IDEs) for R, or for that matter for any programming language. From my point of view, they take up too much precious real estate on the screen, and most important, they generally do not allow me to use my own text editor and my own abbreviations and … Continue...

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New Release of partools Package

July 17, 2016
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New Release of partools Package

My new release of partools is now on CRAN. The package is aimed at doing parallel data science in what I call an “un-MapReduce” manner. It takes the point of view that MapReduce-based frameworks such as Hadoop and Spark are fine for the types of applications their designers had in mind, namely rather simple SQL … Continue...

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Bad Coder, Bad Coder!

July 7, 2016
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Bad Coder, Bad Coder!

My title here is in the sense of “Bad dog, bad dog!”, a scolding I sometimes see dog owners use to tame their pets, and is also an allusion to Bad Reporter, a sometimes hilarious and always irreverent political comic strip in the San Francisco Chronicle. And my title is intended to convey the point … Continue reading...

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Latest on the Julia Language (vs. R)

July 6, 2016
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Latest on the Julia Language (vs. R)

I’ve written before about the Julia language. As someone who is very active in the R community, I am biased of course, and have been (and remain) a skeptic about Julia. But I would like to report on a wonderful talk I attended today at Stanford. To my surprise and delight, the speaker, Viral Shah of Julia … Continue reading...

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Student-Run Conference in Data Science

May 5, 2016
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Student-Run Conference in Data Science

I’d like to urge all of you in Northern California to attend iidata, a student-run conference in data science, to be held on the UC Davis campus on May 21. According to the Web page, iidata is a one-day, collegiate-level Data Science convention aimed at educating students in the new, thrilling field of data science. … Continue reading...

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Talk on regtools and P-Values

April 28, 2016
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Talk on regtools and P-Values

I’m deeply greatful to Hui Lin and the inimitable Yihui Xie for arranging for me to give a “virtual seminar talk” to the Central Iowa R Users Group. You can view my talk, including an interesting Q&A session, online. (The actual start is at 0:34.) There are two separate topics, my regtools package (related to … Continue reading...

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