279 search results for "animation"

Pseudo-Random vs. Random Numbers in R

November 25, 2011
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Pseudo-Random vs. Random Numbers in R

Happy Thanksgiving, everyone. Earlier today, I found an interesting post from Bo Allen on pseudo-random vs random numbers, where the author uses a simple bitmap (heat map) to show that the rand function in PHP has a systematic pattern and compares these to truly random numbers obtained from random.org. The post’s results suggest that pseudo-randomness in PHP is

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Volume by Price Charts using R

November 23, 2011
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Volume by Price Charts using R

R-Bloggers is a wonderful site which offers some great ideas for analysis.While I have been busy of late, hence could not do much with R, I was inspired by this post by Eric Nguyen on Volume by Price chart. This chart can be used with a great effe...

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Changing world, Changing JGB term structure

November 10, 2011
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Changing world, Changing JGB term structure

Writing the article "How much does "Beta" change depending on time?", I learned how to create an animation by using R language. Then, I would like to continue do that in this article.In this article, I visualize time series of JGB term struct...

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Next Level Web Scraping

November 5, 2011
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Next Level Web Scraping

The outcome presented above will not be very useful to most of you - still, this could be a good example for what possibly can be done via web scraping in R.Background: TIRIS is the federal geo-statistical service of North-Tyrol, Austria. One of many g...

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How much does "Beta" change depending on time?

November 1, 2011
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How much does "Beta" change depending on time?

You may often use "Beta" to measure the market exposure of your portfolio because it's easy to calculate.Since I have been wondering how much "Beta" change depending on time, more precisely writing, data-set and the period of return time series, I...

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Queueing up in R, continued

October 20, 2011
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Queueing up in R, continued

Shown above is a queueing simulation. Each diamond represents a person. The vertical line up is the queue; at the bottom are 5 slots where the people are attended. The size of each diamond is proportional to the log of the time it will take them to be attended. Color is used to tell one

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Mining Lending Club’s Goldmine of Loan Data Part I of II – Visualizations by State

October 14, 2011
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Mining Lending Club’s Goldmine of Loan Data Part I of II – Visualizations by State

I have a few friends that keep bragging about their 14% annual returns by investing their money with Lending Club, a peer-to-peer lending service that cuts out the complexities and difficulties of getting approved for a loan through a bank. To give you an idea of the sheer amount of volume Lending Club has been

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FFT / Power Spectrum Box-and-Whisker Plot with Gggplot2

October 6, 2011
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I have a bunch of time series whose power spectra (FFT via R's spectrum() function) I've been trying to visualize in an intuitive, aesthetically appealing way. At first, I just used lattice's bwplot, but the spacing of the X-axis here really matters. ...

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New R-generated Video: Has StackOverflow Posting Behavior Changed Over Time?

October 5, 2011
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New R-generated Video:  Has StackOverflow Posting Behavior Changed Over Time?

Sparks have been flying between my favorite data analysis language and my favorite programmer's Q & A site since long ago: R flirted with StackOverflow on September 10, 2008, 5 days before StackOverflow was even open to the public. R still hesitates to leave its original suitor, the loud and lively R-help mailing list, where

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Hot Spot Mapping in R: Illustrating Relative Seasonal Risk

October 5, 2011
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Hot Spot Mapping in R: Illustrating Relative Seasonal Risk

In recent months, IDV has taken steps to incorporate the powerful statistical engine, R, as a viable connection to Visual Fusion.  R has a robust and growing set of libraries and a community that is constantly thumping away on improvements.  ...

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