59 search results for "ecdf"

Entropy Based Image Binarization with imager and FSelectorRcpp

January 8, 2017
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Entropy Based Image Binarization with imager and FSelectorRcpp

The image processing and the computer vision have gained a significant interest in last 2 decades. The image analysis can be used to detect items or people on images and videos. It is widely used in the medicine to detect cancer tissues and to improve...

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Price Volatility – Basic Brownian Motion

December 23, 2016
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Price Volatility – Basic Brownian Motion

The Situation You are a consultant who has been hired by a business that sells one commodity product. On December 31st the price is $100 per unit. The business owner wants to know what to expect by the end of January. Your client gave you the message: Prices are based off the the sales the

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Price Volatility – Basic Brownian Motion

December 22, 2016
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Price Volatility – Basic Brownian Motion

You are a consultant who has been hired by a business that sells one commodity. The business owner wants to know what to expect by the end of January.

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variance of an exponential order statistics

November 7, 2016
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variance of an exponential order statistics

This afternoon, one of my Monte Carlo students at ENSAE came to me with an exercise from Monte Carlo Statistical Methods that I did not remember having written. And I thus “charged” George Casella with authorship for that exercise! Exercise 3.3 starts with the usual question (a) about the (Binomial) precision of a tail probability

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A Simple Guide to S3 Methods

November 5, 2016
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A few months ago I wrote about my first solo author submission to the R Journal entitled, “A Simple Guide to S3 Methods”. Unfortunately the article didn’t make it to publication on the R Journal, but admittedly that might have been a bit of a lon...

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R 3.2.4 is released

March 11, 2016
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R 3.2.4 is released

R 3.2.4 (codename “Very Secure Dishes”) was released today. You can get the latest binaries version from here. (or the .tar.gz source code from here). The full list of new features and bug fixes is provided below. Upgrading to R 3.2.4 on Windows If you are using Windows you can easily upgrade to the latest version of R using the installr … Continue reading...

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Why should you backup your R objects?

February 18, 2016
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Why should you backup your R objects?

There is a saying that there are two groups of people: those who are already doing backups and those who will. So, how this is linked with reproducible research and R? If your work is to analyze data then you often face a need to restore/recreate/update results that you have generated some time ago. You … Czytaj dalej...

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Using htmlwidgets with knitr and Jekyll

November 15, 2015
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Using htmlwidgets with knitr and Jekyll

A few weeks ago I gave a talk at BARUG (and wrote a post) about blogging with the excellent knitr-jekyll repo. Yihui’s system is fantastic, but it does have one drawback: None of those fancy new htmlwidgets packages seem to work… A few people have run into this. I recently figured out...

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R 3.2.0 is released (+ using the installr package to upgrade in Windows OS)

April 17, 2015
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R 3.2.0 is released (+ using the installr package to upgrade in Windows OS)

R 3.2.0 (codename “Full of Ingredients”) was released yesterday. You can get the latest binaries version from here. (or the .tar.gz source code from here). The full list of new features and bug fixes is provided below. Upgrading to R 3.2.0 on Windows If you are using Windows you can easily upgrade to the latest version of R using the installr … Continue reading...

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Why the Ban on P-Values? And What Now?

March 6, 2015
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Why the Ban on P-Values? And What Now?

Just recently, the editors of the academic journal Basic and Applied Social Psychology have decided to ban p-values: that’s right, the nexus for inferential decision making… gone! This has created quite a

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