Posts Tagged ‘ Uncategorized ’

Large matrices in SAS/IML 14.1

July 31, 2015
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Large matrices in SAS/IML 14.1

Last week, SAS released the 14.1 version of its analytics products, which are shipped as part of the third maintenance release of 9.4. If you run SAS/IML programs from a 64-bit Windows PC, you might be interested to know that you can now create matrices with about 231 ≈ 2 […] The post Large matrices in SAS/IML 14.1 appeared first on The DO Loop.

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Autonomous killing machines won’t look like the Terminator…and that is why they are so scary

July 30, 2015
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Autonomous killing machines won’t look like the Terminator…and that is why they are so scary

Just a few days ago many of the most incredible minds in science and technology urged governments to avoid using artificial intelligence to create autonomous killing machines. One thing that always happens when such a warning is put into place is you see the inevitable Terminator picture:     The reality is that robots that

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Odds ratio plots with a logarithmic scale in SAS

July 29, 2015
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Odds ratio plots with a logarithmic scale in SAS

I recently read an argument by Andrew Wheeler for using a logarithmic axis for plotting odds ratios. I found his argument convincing. Accordingly, this blog post shows how to create an odds ratio plot in SAS where the ratio axis is displayed on a log scale. Thanks to Bob Derr […] The post Odds ratio plots with a logarithmic scale in SAS appeared first on The DO Loop.

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Announcing the JHU Data Science Hackathon 2015

July 28, 2015
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We are pleased to announce that the Department of Biostatistics at the Johns Hopkins Bloomberg School of Public Health will be hosting the first ever JHU Data Science Hackathon (DaSH) on September 21-23, 2015 at the Baltimore Marriott Waterfront. This event will be an opportunity for data scientists and data scientists-in-training to get together and

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Convert a vector to a string

July 27, 2015
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Convert a vector to a string

Base SAS contains many functions for processing strings, and you can call these functions from within a SAS/IML program. However, sometimes a SAS/IML programmer needs to process a vector of strings. No problem! You can call most Base SAS functions with a vector of parameters. I have previously written about […] The post Convert a vector to a string appeared first on The DO Loop.

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Wealth and winning in NC high school athletics

July 26, 2015
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Wealth and winning in NC high school athletics

The Raleigh News & Observer published a front-page article about the effect of wealth and poverty on high school athletics in North Carolina. In particular, the article concluded that "high schools with a high percentage of poor students rarely win titles in the so-called country club sports—tennis, golf and swimming—and […] The post Wealth and winning in NC high school athletics appeared first on The DO Loop.

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stringsAsFactors: An unauthorized biography

July 24, 2015
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Recently, I was listening in on the conversation of some colleagues who were discussing a bug in their R code. The bug was ultimately traced back to the well-known phenomenon that functions like 'read.table()' and 'read.csv()' in R convert columns that are detected to be character/strings to be factor variables. This lead to the spontaneous

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The relationship between toothlessness and income

July 24, 2015
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The relationship between toothlessness and income

My colleague Robert Allison finds the most interesting data sets to visualize! Yesterday he posted a visualization of toothless seniors in the US. More precisely, he created graphs that show the estimated prevalence of adults (65 years or older) who have had all their natural teeth extracted. The dental profession […] The post The relationship between toothlessness and income appeared first on The DO Loop.

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A new method to simulate the triangular distribution

July 22, 2015
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A new method to simulate the triangular distribution

The triangular distribution has applications in risk analysis and reliability analysis. It is also a useful theoretical tool because of its simplicity. Its density function is piecewise linear. The standardized distribution is defined on [0,1] and has one parameter, 0 ≤ c ≤ 1, which determines the peak of the […] The post A new method to simulate the triangular distribution appeared first on The DO Loop.

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Don’t put your whiteboard behind your projection screen

July 20, 2015
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Daniel, Andrew, and I are on our second day of teaching, and like many places, Memorial Sloan-Kettering has all their classrooms set up with a whiteboard placed directly behind a projection screen. This gives us a sliver of space to write on without pulling the screen up and down. If you have any say in […] The post Don’t put your whiteboard behind your projection screen appeared first on Statistical…

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