3871 search results for "git"

Additional Plots on French Breakpoints as Valuation

February 21, 2013
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Additional Plots on French Breakpoints as Valuation

I feel like there might be some merit in Slightly Different Measure of Valuation using Ken French’s Market(ME) to Book(BE) Breakpoints by percentile to offer an additional valuation metric for US stocks.  I thought some additional plots might he...

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Elevation Profiles in R

February 21, 2013
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Elevation Profiles in R

First, let's load up our data. The data are available in a gist. You can convert your own GPS data to .csv by following the instructions here, using gpsbabel.gps <- read.csv("callan.csv",  header = TRUE)Next, we can use the function SMA fr...

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Examining Overlapping Meetup Memberships with Venn Diagrams

February 21, 2013
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Examining Overlapping Meetup Memberships with Venn Diagrams

As of the beginning of 2013, Data Community DC ran three Meetup groups: Data Science DC, Data Business DC, and R Users DC. We’ve often wondered how much these three groups overlapped. In this post, I’m going to show you … Continue reading → The post Examining Overlapping Meetup Memberships with Venn Diagrams appeared first on Data...

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Model Selection and Multi-Model Inference

February 20, 2013
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Model Selection and Multi-Model Inference

At D-RUG this week Rosemary Hartman presented a really useful case study in model selection, based on her work on frog habitat. Here is her code run through ‘knitr’. Original code and data are posted here. (yes, I am just doing this for the flying monkey) Editor’s note: we’re giving away flying monkey dolls from our...

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Analysis of Public .Rhistory Files

February 20, 2013
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Analysis of Public .Rhistory Files

GitHub recently launched a more powerful search feature which has been used on more than one occasion to identify sensitive files that may be hosted in a public GitHub repository. When used innocently, there are all sorts of fun things you can find with this search feature. Inspired by Aldo Cortesi's post documenting his exploration

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Fixing My Internet With R and Python

February 20, 2013
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Fixing My Internet With R and Python

Last summer, I had some internet connectivity problems. Specifically, I would have massive latency issues that affected my conversations on Skype and my relatively pathetic under the best of circumstances efforts at online gaming. It was driving me up a wall and I couldn't figure it out. It hadn't...

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Interactive two-host SIR model

February 20, 2013
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Interactive two-host SIR model

This is an example of interfacing R, shiny, and deSolve to produce an interactive environment where users can explore model behavior by altering parameters in an easy to use GUI. The model tracks the number of susceptible, infectious, and recovered individuals in two co-occuring host species. The rates of change for each class are represented as a system of differential...

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Another Way to Look at Vanguard and Pimco

February 20, 2013
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Another Way to Look at Vanguard and Pimco

I like the results of the analysis shown in my post Applying Tradeblotter’s Nice Work Across Manager Rather than Time, but I was not satisfied that the plot allowed a quick summary comparison of the two massive fund complexes.  I am much more pl...

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Interactive two-host SIR model

February 20, 2013
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This is an example of interfacing R, shiny, and deSolve to produce an interactive environment where users can explore model behavior by altering parameters in an easy to use GUI. The model tracks the number of susceptible, infectious, and recovered individuals in two co-occuring host species. The rates of change for each class are represented as a system of...

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Momentum in R: Part 4 with Quantstrat

February 19, 2013
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Momentum in R: Part 4 with Quantstrat

The past few posts on momentum with R focused on a relatively simple way to backtest momentum strategies. In part 4, I use the quantstrat framework to backtest a momentum strategy. Using quantstrat opens the door to several features and options as well as an order book to check the trades at the completion of … Continue reading...

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