Posts Tagged ‘ statistics ’

Toi aussi, raconte ce que tu veux avec des graphiques

March 23, 2017
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Toi aussi, raconte ce que tu veux avec des graphiques

L’autre jour, les décodeurs publiaient sur le site du Monde un article sur l’utilisation des graphiques en base 100, Je reprends le commentaire Celui-ci indique, sans appel selon Mme Le Pen, le déclin des économies françaises, italiennes et espagnoles face à l’industrie allemande. Marine Le Pen n’hésite ainsi pas à affirmer que le déclin de la production française est lié à l’introduction de la monnaie unique en 2001. On peut reconstruire le graphique assez…

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Datashader is a big deal

March 22, 2017
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Datashader is a big deal

I recently got back from Strata West 2017 (where I ran a very well received workshop on R and Spark). One thing that really stood out for me at the exhibition hall was Bokeh plus datashader from Continuum Analytics. I had the privilege of having Peter Wang himself demonstrate datashader for me and answer a … Continue reading Datashader is a big deal

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Sorting correlation coefficients by their magnitudes in a SAS macro

Sorting correlation coefficients by their magnitudes in a SAS macro

Theoretical Background Many statisticians and data scientists use the correlation coefficient to study the relationship between 2 variables.  For 2 random variables, and , the correlation coefficient between them is defined as their covariance scaled by the product of their standard deviations.  Algebraically, this can be expressed as . In real life, you can never […]

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Practical Data Science with R: ACM SIGACT News Book Review and Discount!

March 19, 2017
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Practical Data Science with R: ACM SIGACT News Book Review and Discount!

Our book Practical Data Science with R has just been reviewed in Association for Computing Machinery Special Interest Group on Algorithms and Computation Theory (ACM SIGACT) News by Dr. Allan M. Miller (U.C. Berkeley)! The book is half off at Manning form March 21st 2017 using the following code (please share/Tweet): Deal of the Day … Continue reading Practical Data Science with R: ACM SIGACT News Book Review and Discount!

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Practical Data Science with R: ACM SIGACT News Book Review and Discount!

March 19, 2017
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Practical Data Science with R: ACM SIGACT News Book Review and Discount!

Our book Practical Data Science with R has just been reviewed in Association for Computing Machinery Special Interest Group on Algorithms and Computation Theory (ACM SIGACT) News by Dr. Allan M. Miller (U.C. Berkeley)! The book is half off at Manning March 21st 2017 using the following code (please share/Tweet): Deal of the Day March … Continue reading Practical Data Science with R: ACM SIGACT News Book Review and Discount!

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The U.S. Has Been At War 222 Out of 239 Years

March 19, 2017
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The U.S. Has Been At War 222 Out of 239 Years

This morning, I discovered an interesting statistic, America Has Been At War 93% of the Time – 222 Out of 239 Years – Since 1776,  i.e. the U.S. has only been at peace for less than 20 years total since its birth. I wanted to check, get a better understanding and look at other countries in the world. As always, we can try to extract information from wikipedia, since there are…

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what does more efficient Monte Carlo mean?

March 16, 2017
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what does more efficient Monte Carlo mean?

“I was just thinking that there might be a magic trick to simulate directly from this distribution without having to go for less efficient methods.” In a simple question on X validated a few days ago [about simulating from x²φ(x)] popped up the remark that the person asking the question wanted a direct simulation method […]

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New screencast: using R and RStudio to install and experiment with Apache Spark

March 15, 2017
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I have new short screencast up: using R and RStudio to install and experiment with Apache Spark. More material from my recent Strata workshop Modeling big data with R, sparklyr, and Apache Spark can be found here.

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Peter Lee (1940?-2017)

March 11, 2017
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Peter Lee (1940?-2017)

Just heard the sad news that Peter Lee, British Bayesian and author of Bayesian Statistics: An Introduction, has passed away yesterday night. While I did not know him, I remember meeting him at a few conferences in the UK and spending an hilarious evening at the pub. When the book came out, I thought it […]

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Peter Lee (1940?-2017)

March 11, 2017
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Peter Lee (1940?-2017)

Just heard the sad news that Peter Lee, British Bayesian and author of Bayesian Statistics: An Introduction, has passed away yesterday night. While I did not know him, I remember meeting him at a few conferences in the UK and spending an hilarious evening at the pub. When the book came out, I thought it […]

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