Blog Archives

Data Science Boot Camp

May 12, 2016
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Data Science Boot Camp

If you live in or near Toronto, are interested in learning about data science, and can spare Friday afternoons, then you are in luck. I am offering a Data Science Boot Camp at Ryerson University in collaboration with IBM's BigDataUniversity.com. The Boot Camp is largely...

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Getting Started with Data Science: Storytelling with Data

January 13, 2016
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Getting Started with Data Science: Storytelling with Data

Earlier this month, IBM Press and Pearson have published my book titled: Getting Started with Data Science: Making Sense of Data with Analytics. You can download sample pages, including a complete chapter. There are 104 pages in the sample. You can also watch a brief interview about the book recorded...

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Not so sweet sixteen!

December 6, 2015
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Not so sweet sixteen!

In the world of big data and real-time analytics, Microsoft users are still living with the constraints of the bygone days of little data and basic numeracy.If you happen to use Microsoft Excel for running Regressions, you will soon realize your limits:  The Windows version of Excel 2013 permits no more than 16 explanatory variables.

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Curious about big data in Montreal?

October 30, 2015
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Curious about big data in Montreal?

Are you in Montreal and curious about big data? Well here is your chance to attend a session about the same at Concordia University on Tuesday, Nov. 03 at 6:00 pm.www.BigDataUniversity.com, which is an IBM-led initiative is running meetups across North...

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Are Canadian newspapers painting false pictures with data?

May 20, 2015
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Are Canadian newspapers painting false pictures with data?

The Canadian newspaper, Globe and Mail, is a leader in diction and style, but it may need improvement in the ‘grammar of graphics’.Globe’s recent depiction of metropolitan economic growth in the series Off the Charts was way off the mark. The chart plotted the current and forecasted GDP growth rates for select cities in Canada. The...

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Stata embraces Bayesian statistics

April 9, 2015
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Stata 14 has just been released. The new and big thing with version 14 is the introduction of Bayesian Statistics. A wide variety of new models can now be estimated with Stata by combining 10 likelihood models, 18 prior distributions, different types of outcomes, and multiple equation models. Stata has also made available a...

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R: What to do when help doesn’t arrive

November 3, 2014
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R is great when it works. Not so much, when it doesn’t. Specifically, this becomes a concern when the packages are not fully illustrated in the accompanied help documentation, and the author/s of the package don’t respond (in time).I am not suggesting that the package authors should respond to every email that they receive. My request is that...

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Summarize statistics by Groups in R & R Commander

December 8, 2013
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Summarize statistics by Groups in R & R Commander

R is great at accomplishing complex tasks. Doing simple things with R though takes some effort. Consider the simple task of producing summary statistics for continuous variables over some factor variables. Using Stata, I’d write a brief one-liner to get the mean for one or more variables using another variable as a factor. For instance, tabstat Horsepower RPM, by(Type) ...

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Comparing mnlogit and mlogit for discrete choice models

December 8, 2013
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Earlier this weekend (Dec. 7, 2013), mnlogit was released on CRAN by Wang Zhiyu and Asad Hasan ([email protected]) claiming that mnlogit uses “parallel C++ library to achieve fast computation of Hessian matrices”. Here is a comparison of mnlogit with mlogit by Yves Croissant whose package seems to be the inspiration for mnlogit. I will estimate the same model using the same data...

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What happened to six million voters?

May 22, 2013
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What happened to six million voters?

The recent elections in Pakistan on May 11 were a great success by all means. In spite of the threats for violence by Al-Qaeda and its local franchises in Pakistan against those who would vote, millions of Pakistanis indeed stepped out to vote for an elected government. The Election Commission of Pakistan (ECP) claimed a voter turnout of 60%....

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