2352 search results for "Time series"

Parallel R with BatchJobs

March 28, 2015
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Parallel R with BatchJobs

Parallelizing R with BatchJobs – An example using k-means Gord Sissons, Feng Li Many simulations in R are long running. Analysis of statistical algorithms can generate workloads that run for hours if not days tying up a single computer. Given the amount of time R programmers can spend waiting for results, getting acquainted parallelism makes

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R style default plot for Pandas DataFrame

March 28, 2015
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R style default plot for Pandas DataFrame

The default plot method for dataframes in R is to show each numeric variable in a pair-wise scatter plot. I find this to be a really useful first look at dataset, both to see correlations and joint distributions between variables, but also to quickly diagnose potential strangeness like bands of repeating values or outliers. From

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rClr 0.7-4 released

March 26, 2015
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rClr 0.7-4 released

Version 0.7-4 of rClr (source code mirrored on GitHub), a package to access arbitrary .NET code seamlessly and in-process, has been released.This is a maintenance release with an important fix to memory management. In some circumstances, passing data ...

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NASDAQ 100 Couples

March 25, 2015
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NASDAQ 100 Couples

Heaven, I’m in heaven, and my heart beats so that I can hardly speak, and I seem to find the happiness I seek, when we’re out together dancing cheek to cheek (Cheek To Cheek, Irving Berlin) There are about 6.500 available packages in CRAN repository. If I were a superhuman, able to learn one package … Continue reading...

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Factor Evaluation in Quantitative Portfolio Management

March 23, 2015
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Factor Evaluation in Quantitative Portfolio Management

When it comes to managing a portfolio of stocks versus a benchmark the problem is very different from defining an absolute return strategy. In the former one has to hold more stocks than in the later where no stocks at all can be held  if there is not good enough opportunity.  The reason for that is the tracking error. This

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Hypothesis Testing: Fishing for Trouble

March 23, 2015
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Hypothesis Testing: Fishing for Trouble

Monday 23 March 2015 - 14:50 Introduction "Can you check if this is significant?" It was a seemingly innocuous question from a dangerous source: a semi data-literate scientist. The kind who believed, deep in his heart, that small p-values were ...

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Hypothesis Testing: Fishing for Trouble

March 23, 2015
By
Hypothesis Testing: Fishing for Trouble

Monday 23 March 2015 - 14:50 Introduction "Can you check if this is significant?" It was a seemingly innocuous question from a dangerous source: a semi data-literate scientist. The kind who believed, deep in his heart, that small p-values were ...

Read more »

Release of psd 1.0 to CRAN

March 23, 2015
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Release of psd 1.0 to CRAN

Greetings, Interweb! I’m pleased to announce psd 1.0, a long-overdue major update from the 0.* series which includes significant advancements in performance, improved clarity and consistency of documentation and method/class handling, and the elimination a few long-standing bugs. Some major changes include: … Continue reading →

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Release of psd 1.0 to CRAN

March 23, 2015
By
Release of psd 1.0 to CRAN

Greetings, Interweb! I’m pleased to announce psd 1.0, a long-overdue major update from the 0.* series which includes significant advancements in performance, improved clarity and consistency of documentation and method/class handling, and the elimination a few long-standing bugs. Some major changes include: Most importantly, all major bottlenecks have been eliminated with new c++ codes: the adaptive method

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New visualization of the distribution of p-values using d3.js

March 21, 2015
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New visualization of the distribution of p-values using d3.js

I just published a new interactive visualization in my series of basic statistical concepts and techniques. This time I am trying to show how p-values are distributed. Check it out here: rpsychologist.com/d3/pdist/

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